Computer Hardware

 What is Computer Hradware? You may get the basic computer hardware knowledge from the link http://www.basichardware.com/ . Some computer  trouble shooting  tips are given below.


MOTHERBOARD TROUBLESHOOTING

A.)GENERAL TESTING TIPS.
Before you begin, download a few of our Diagnostic Software Tools to pinpoint possible problem areas in your PC. Ideally, troubleshooting is best accomplished with duplicate parts from a used computer enabling "test" swapping of peripheral devices/cards/chips/cables. In general, it is best to troubleshoot on systems that have been leaned-out. Remove unnecessary peripherals (soundcard, modem, harddisk, etc.) to check the unworking device in as much isolation as possible. Also, when swapping devices, don't forget the power supply. Power incompetency (watts and volts) can cause intermittent problems at all levels, but especially with UARTS and HD's.
Inspect the motherboard for loose components. A loose or missing CPU, BIOS chip, Crystal Oscillator, or Chipset chip will cause the motherboard not to function. Also check for loose or missing jumper caps, missing or loose memory chips (cache and SIMM's or DIMM's). To possibly save you hours of frustration i'll mention this here, check the BIOS Setup settings. 60% of the time this is the cause of many system failures. A quick fix is to restore the BIOS Defaults. Next, eliminate the possibility of interference by a bad or improperly set up I/O card by removing all cards except the video adapter. The system should at least power up and wait for a drive time-out. Insert the cards back into the system one at a time until the problem happens again. When the system does nothing, the problem will be with the last expansion card that was put in.
B.)RESETTING CMOS.
Did you recently 'flash' your computers BIOS, and needed to change a jumper to do so? Perhaps you left the jumper in the 'flash' position which could cause the CMOS to be erased.
If you require the CMOS Reset and don't have the proper jumper settings try these methods: Our Help Desk receives so many requests on Clearing BIOS/CMOS Passwords that we've put together a standard text outlining the various solutions.

C.)NO POWER.
Switching power supplies (the most common used PC's), cannot be adequately field-tested with V/OHM meters. Remember: for most switching power supplies to work, a FLOPPY and at least 1 meg of memory must be present on the motherboard. If the necessary components are present on the motherboard and there is no power:
1) check the power cable to the wall and that the wall socket is working. (You'd be surprised!)
2) swap power supply with one that is known to work.
3) if the system still doesn't work, check for fuses on the motherboard. If there are none, you must replace the motherboard.

D.)PERIPHERAL WON'T WORK.
Peripherals are any devices that are connected to the motherboard, including I/O boards, RS232/UART devices (including mice and modems), floppies and fixed-disks, video cards, etc. On modern boards, many peripherals are integrated into the motherboard, meaning, if one peripheral fails, effectually the motherboard has to be replaced.* On older boards, peripherals were added via daughter boards.
*some MB CMOS's allow for disabling on-board devices, which may be an option for not replacing the motherboard -- though, in practicality, some peripheral boards can cost as much, if not more, than the motherboard. Also, failure of on-board devices may signal a cascading failure to other components.
1. New peripheral?
a) Check the MB BIOS documentation/setup to ensure that the BIOS supports the device and that the MB is correctly configured for the device.
(Note>> when in doubt, reset CMOS to DEFAULT VALUES. These are ) (optimized for the most generalized settings that avoid some of) (the conflicts that result from improper 'tweaking'. )
b) Check cable attachments & orientation (don't just look, reattach!)
c) If that doesn't work, double-check jumper/PnP (including software and/or MB BIOS set) settings on the device.
d) If that doesn't work, try another peripheral of same brand & model that is known to work.
e) If the swap peripheral works, the original peripheral is most likely the problem. (You can verify this by testing the non-working peripheral on a test MB of the same make & bios.)
f) If the swap periphal doesn't on the MB, verify the functionality of the first peripheral on a test machine. If the first peripheral works on another machine AND IF the set-up of the motherboard BIOS is verified AND IF all potentially conflicting peripherals have been removed OR verified to not be in conflict, the motherboard is suspect. (However, see #D below.)
g) At this point, recheck MB or BIOS documentation to see if there are known bugs with the peripheral AND to verify any MB or peripheral jumper settings that are necessary for the particular peripheral to work. Also, try a different peripheral of the same kind but a different make to see if it works. If it does not, swap the motherboard. (However, see #D below.)

2. Peripheral that worked before?
a) If the hood has been opened (or even if it has not), check the orientation and/or seating of the cables. Cables sometimes 'shake' loose or are accidentally pulled out by end-users, who then misalign or do not reattach them.
b) If that doesn't work, try the peripheral in another machine of the same make & bios that is known to work. If the peripheral still doesn't work, the peripheral is most likely the problem. (This can be verified by swapping-in a working peripheral of the same make and model AND that is configured the same as the one that is not working. If it works, then the first peripheral is the problem.)
c) If the peripheral works on another machine, double-check other peripherals and/or potential conflicts on the MB, including the power supply. If none can be found, suspect the MB.
d) At this point, recheck MB or BIOS documentation to see if there are known bugs with the peripheral AND to verify any jumper settings that might be necessary for the particular peripheral. Also, try another peripheral of the same kind but a different make to see if it works. If not, swap the motherboard!

E.)OTHER INDICATIONS OF A PROBLEM MOTHERBOARD.
1. CLOCK that won't keep correct time. >>Be sure to check/change the battery.
2. CMOS that won't hold configuration information. >>Again, check/change the battery.
Note about batteries and CMOS: in theory, CMOS should retain configuration information even if the system battery is removed or dies. In practice, some systems rely on the battery to hold this information. On these systems, a machine that is not powered-up for a week or two may report improper BIOS configuration. To check this kind of system, change the battery, power-up and run the system for several hours. If the CMOS is working, the information should be retained with the system off for more than 24 hours.

F.)BAD MOTHERBOARD OR OBSOLETE BIOS?
1. If the motherboard cannot configure to a particular peripheral, don't automatically assume a bad motherboard, even if the peripheral checks out on another machine -- especially if the other machine has a different BIOS revision. Check with the board manufacturer to see if a BIOS upgrade is available. Many BIOS upgrades can be made right on the MB with a FLASH RAM program provided by the board maker. See our BIOS page for more information

Half of all computer problems are related to cabling and connections. Ensure all cables are connected and connected firmly. Ribbon cables and power cables can often go loose. Ensure microprocessor, memory modules, and adapters such as video card are inserted correctly and didn't "pop-up" due to vibration.

System has no power at all. Power light does not illuminate, fan inside the power supply does not turn on, and indicator light on keyboard does not turn on.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Power cable is unplugged.
Visually inspect power cable.
Make sure power cable is securely plugged in.
Defective power cable.
Visual inspection, try another cable.
Replace cable.
Power supply failure.
Power cable and wall socket are OK, but system is still dead.
Contact technical support
Faulty wall outlet;circuit breaker or fuse blown.
Plug device into socket know to work and test.
Use different socket, repair outlet, reset circuit breaker or replace fuse.


System inoperative. Keyboard lights are on, power indicator lights are lit, and hard drive is spinning.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Expansion card is partially dislodged from expansion slot on the motherboard.
Turn off computer. Take cover off system unit.
Check all expansion cards to ensure they are securely seated in slots.
Using even pressure on both ends of the expansion card, press down firmly on expansion card.
Defective floppy disk drive or tape drive.
Turn system off.
Disconnect the cables from one of the floppy drives. Turn on the system, check to see if the keyboard operates normally. Repeat until you have located defective unit.
Contact Technical Support.
Defective expansion card.
Turn computer off.
Remove an expansion card.
Make sure expansion card is secure in expansion socket.


System does not boot from hard disk drive, can be booted from floppy disk drive.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Connector between hard drive and system board unplugged.
When attempting to run the FDISK utility described in the HARD DISK section of this manual you get a message, INVALID DRIVE SPECIFICATION.
Check cable running form disk to disk controller on the board. Make sure both ends are securely plugged in; check the drive type in the Standard CMOS Setup (in your motherboard manual).
Damaged Hard Disk or Disk Controller.
Format hard disk; if unable to do so, the hard disk may be defective.
Contact Technical Support.
Hard Disk directory or FAT is scrambled.
Run the FDISK program, format the hard drive(See HARD DRIVE section of manual). Copy your backup data back onto hard drive.
Backing up the hard drive is extremely important. All Hard Disks are capable of breaking down at any time.


System only boots from Floppy Disk. Hard Disk can be read and applications can be used, but booting from Hard Disk is impossible.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Hard Disk boot program has been destroyed.
A number of causes could be behind this.
Back up data and applications files.
Reformat the Hard Drive as described in the Hard Drive section of this manual. Re-install applications and data using backup disks.


Error message reading "SECTOR NOT FOUND" or other error messages indication certain data is not allowed to be retrieved.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
A number of causes could be behind this.
Use a file by file backup instead of an image backup to backup the Hard Disk.
Back up any salvageable data. Then do a low level format, partition, and high level format of the hard drive( see Hard Disk section of your manual for instructions). Re-install all saved data when completed.


Disk formatted on IBM PS/2 will not operate with this system.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
The IBM PS/2 uses a different format than other computers.
IBM PS/2 disk format will not work in an AT type computer.
Format disk in the AT type computer insert disk into the IBM PS/2 and copy the files you wish.


After install an expansion card (network card, tape drive card, etc.) the system no longer works properly.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
No power to monitor.
All or part of the system may be inoperable. The new card may work but a mouse or COM port may not work.
Change the interrupt or RAM address on the new expansion card. See the documentation that came with the new card in order to change pin settings. many expansion devices come with proprietary software that will assist you in doing this.


Screen message says "Invalid Configuration" or "CMOS Failure."
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Incorrect information entered into the configuration (setup) program.
Check the configuration program. Replace any incorrect information.
Review system's equipment. Make sure correct information is in setup.


Screen is blank.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
No power to monitor.

Check the power connectors to monitor and to system. Make sure monitor is connected to display card, change I/O address on network card if applicable.
Monitor not connected to computer.

See instructions above.
Network card I/O address conflict.

See instructions above.


System does not boot from hard disk drive, can be booted from floppy disk drive.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Connector between hard drive and system board unplugged.
When attempting to run the FDISK utility described in the HARD DISK section of this manual you get a message, INVALID DRIVE SPECIFICATION.
Check cable running form disk to disk controller on the board. Make sure both ends are securely plugged in; check the drive type in the Standard CMOS Setup (in your


Problem
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Memory problem, display card jumpers not set correctly.

Reboot computer. Re-install memory, make sure that all memory modules are installed in correct sockets. Check jumper and switch settings on display card. See display card section for information of settings.
Computer virus.

Use anti-virus programs (McAfee/PC-cillin, E-port, etc) to detect and clean viruses.


Screen goes blank periodically.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Screen saver is enabled.

Disable screen saver.


Keyboard failure.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Keyboard is disconnected.

Reconnect keyboard. Check keys again, if no improvement, replace keyboard.


No color on screen.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Faulty Monitor.

If possible, connect monitor to another system. If no color, replace monitor.
CMOS incorrectly set up.

Call technical support.


Floppy drive lights stays on.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Floppy Drive cable not connected correctly.

Reconnect floppy cable making sure PIN1 on the Floppy Drive corresponds with PIN1 on floppy cable connector.


Error reading drive A:
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Bad floppy disk.

Try new floppy disk.
Floppy disk not formatted

Format floppy disk(type ENTER)


C: drive failure.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
SETUP program does not have correct information.

Boot from drive A: using DOS system disk. Input correct information to SETUP program.
Hard Drive cable not connected properly.

Check Hard drive cable.


Cannot boot system after installing second hard drive.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Master/Slave jumpers not set correctly.

Set master /Slave jumpers correctly.
Hard Drives not compatible / different manufacturers.

Run SETUP program and select correct drive types. Call drive manufactures for compatibility with other drives.


Missing operating system on hard drive.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
CMOS setup has been changed.

Run setup and select correct drive type.


Certain keys do not function.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Keys jammed or defective.

Replace keyboard.


Keyboard is locked, no keys function.
PROBABLE CAUSE
DIAGNOSIS
SOLUTION
Keyboard is locked.

Unlock keyboard

This table contains the driving clock speeds and the clock multipliers for AMD/Cyrix/Intel processors
brand
CPU name-
rated speed
internal speed
[Mhz]
multiplier
clock (mem bus)
[Mhz]
PCI bus
[Mhz]
Notes/P-rating
Intel/AMD/Cyrix 486 Class
486DX2-66
66
2x
33
33


486DX2-80
80
2x
40
40?
?


Cx486DX4-75
75
3x
25
?



486DX4-100
100
3x
33
33


AMD Enhanced 486 Class
486DX4-120
120
3x
40
40?
?


486DX4-120
100
2x
50
?
2x mode (non-standard)

Intel Pentium®
Pentium®-75
75
1.5x
50
25



Pentium®-90
90
1.5x
60
30



Pentium®-100
100
1.5x
66
33



Pentium®-120
120
2x
60
30



Pentium®-133
133
2x
66
33



Pentium®-150
150
2.5x
60
30



Pentium®-166
166
2.5x
66
33



Pentium®-200
200
3x
66
33


AMD 5x86
Amd5x86-133
133
4x
33
33
P75+


Amd5x86-133
160**
4x
40
40*?
P100+(non-standard)


Amd5x86-133
150**
3x
50
50*?
n/a (non-standard)

Cyrix 5x86
Cx5x86-100
100
2x/3x
50/33

P75+


Cx5x86-120
120
3x
40

P90+

Cyrix 6x86
Cx6x86-100
100
2x
50
25*
P120+


Cx6x86-110
110
2x
55
?
P133+


Cx6x86-120
120
2x
60
30*
P150+


Cx6x86-133
133
2x
66
33*
P166+


Cx6x86-150
150
2x
75
40*
P200+

NexGen
Nx586-80?
I couldn't find any info on this processor

Notes
* are my speculations.
** are overclocked modes. (may damage the CPU, see Overclocking FAQ).
Cyrix 486DX4, 5x86 and 6x86 have 2x/3x clock multiplier.
Amd 5x86 has 3x/4x clock multiplier.
PCI specs are for 33Mhz; dunno if or how PCI stands overclocking to 40 or 50 Mhz.
Only Intel Pentium®s and Cyrix 6x86 have triple clocks (internal/memory/PCI bus). For the others the PCI clock is the same as the memory clock, if not forced to 33 Mhz.




Desktop Boards

Troubleshooting system boot issues





This document lists troubleshooting tips if your computer does not boot up properly.

Contents:

System Does Not Boot up at First Integration

System Used to Boot up and Now Does Not

Other Boot Issues



System Does Not Boot up at First Integration

2x2 or 2x4 Power Connector Not Plugged In
If the power supply cable with the 2x2 connector or 2x4 connector (depending on your desktop board), is not plugged into the 12V processor core voltage connector located near the processor socket, the system will not boot up. You will see lights onboard and on the chassis front panel and the processor fan will spin, but nothing will appear on the monitor. See figures below for cable placement.



or




Processor Issues
No boot situations can be caused by any of the following.

If you have installed an incompatible processor, the system will not boot. Ensure the selected processor model is correct for your desktop board. Some processors require specific desktop board versions and BIOS revisions. To find the supported processor list for your board, go to Supported Processors. If the processor is compatible, try removing and reinstalling the processor to ensure it is installed correctly.

If the processor overheats, the system may not boot or may shut down shortly after booting.
  • Make sure the fans on the processor are connected properly and running.
  • Make sure that the thermal interface material or the thermal grease is applied to the processor properly.
  • Make sure that the power supply fan is running properly and any other external case fans are running properly.
  • Make sure that the air intakes for the external fans are unobstructed and have at least several inches away from walls and other items.

Memory Issues
No boot situations can be caused by any of the following.
  • If you have installed incompatible memory modules, the system may not boot. Verify the memory you've installed has been tested with your board. To find the tested memory list for your board, go to Tested Memory. If the memory is compatible, try removing and reinstalling the memory modules to ensure they are installed correctly.
  • Some desktop boards require you to populate the memory sockets starting with the first socket. The product guide for your desktop board will indicate such a requirement.
  • If you have defective memory modules, the system may not boot. One, two or three beeps at boot indicate defective memory. To isolate a specific memory module as defective, boot the system with just one memory module installed at a time.

Monitor Issues
No boot situations can be caused by monitor configurations. Check the following:
  • Make sure the monitor is plugged in and turned on.
  • Make sure the video cable is connected properly at the monitor and the computer.
  • Check the brightness and contrast controls on the monitor. The monitor may be dimmed where you cannot see anything on the monitor.
  • Most monitors have a light indicating its current status:
    • A green light indicates the monitor has sufficient power and is getting a video signal.
    • An amber light appears if the monitor has power but it is not getting a video signal from the computer. This indicates the problem is most likely in the computer.
    • If the light does not turn on at all, it is likely a problem with the monitor itself. Make sure that the monitor is connected to a working AC outlet. If there is an on/off switch for the outlet, make sure the switch is on. If the problem still persists, try replacing the monitor or try the monitor on different AC outlet or a different system.

Power Supply and Chassis Issues
No boot situations can be caused by any of the following power supply, chassis or fan issues:
  • Verify that your chassis and power supply is appropriate for the processor model and frequency and the desktop board you have.
    • An ATX12V or SFX12V with the 2x2 connector is required for all Pentium® 4 processor based and higher Intel® Desktop Boards. Power consumption requirements for high-end video cards, sound cards, peripherals, and the Pentium 4 processor will exceed the typical 5A current capacity of standard ATX & SPX power supplies.
  • Do not use 2x2 power cable adapters with non-compatible older power supplies.
  • Verify that the power supply has the capacity to power all the devices used in your system.
  • Ensure the power cord is firmly connected to the power supply and the AC outlet.
  • If the power supply or the AC outlet has an on/off switch, make sure that it is on.
  • Determine power supply voltage selector setting (230 volts vs. 115 volts) is correct.
  • Check for foreign objects inside the chassis such as screws that may ground the desktop.
  • Attach the desktop board correctly to the chassis base with the spacers/stand- offs. Make sure not to tighten the screws too much.
  • If possible, use a voltmeter to verify that each output from the power supply is correct. If any output is very low (especially the +5 volt output), consider replacing the power supply.
  • If possible, use a voltmeter to verify the PowerGood signal is +5 volts. If the signal is below 1.0 volts, there may be a short or overload causing a constant reset. Consider replacing the power supply.

Cable Issues

No boot situations can be caused by any of the following cabling issues:
  • Make sure the drive ribbon cables inside the computer are attached correctly and securely. For IDE drives, check the orientation of pin 1 of the hard drive cable. A cable connected backwards may cause the computer not to power up.
  • Check that the cables connecting the chassis front panel to the desktop board are plugged in properly to the onboard headers.

Electrical Short or Overload
An electrical short or overload may cause a system not to boot.

Check for shorts and overloads by removing non-essential items such as extra controller cards or IDE/ATAPI devices. Keep only the desktop board, power supply, memory and processor installed. If the system boots, it is possible there is a short or overload with one of the components that you removed or one of those components is faulty. Replace each of non-essential items one at a time until you isolate which one is causing the problem.

If the problem occurs even after removing the non-essential components, the problem has to be with the desktop board, power supply, memory or processor.


Defective Components
Defective components, especially processor and memory, can cause a system not to boot up properly.
  • Swap the memory modules with known good memory. In addition, test the suspected memory in another known working system.
  • Swap the processor with a known good processor. In addition, test the suspected processor in another known working system.



System Used to Boot up and Now Does Not
Changes to your computer's configuration can cause your system to not boot properly.


New Processor or Additional Memory was Installed
If you upgraded the processor or added memory:
  • Some processors require specific desktop board versions or specific BIOS revisions.
  • Make sure the new processor is supported for your desktop board. To find the supported processor list for your board, go to Supported Processors.
  • Make sure the new memory modules are supported for your desktop board. To find the tested memory list for your board, go to Tested Memory.

New PCI or PCI Express* Card was Installed
If you installed a new add-in card to a PCI or PCI Express slot and now the system won't boot:
  • Some PCI Express graphics cards require additional power.
  • Remove and reinstall the new card to make sure it is fully seated in the slot.
  • Try the card in a different slot, if possible.
  • Make sure other devices and cables inside the chassis were not disturbed or loosened when you installed the new card.

New Drive was Installed
If you added a new drive (hard drive, CD-ROM, DVD) and now the system won't boot:
  • Make sure all drive cables are properly connected.
  • Make sure the correct power cable is connected to the new drive.
  • Make sure any drive jumpers (master, slave) are configured correctly according to the manufacturer's documentation.
  • Make sure other devices and cables inside the chassis were not disturbed or loosened when you added the new drive.

New Software or Drivers were Installed
If you recently installed new software or new device drivers:
  • Try booting into Safe Mode and uninstall the new software or driver. If you can now boot normally, there may be a compatibility issue between the new software or driver and some component in your system. Contact the software manufacturer for assistance.

Settings Were Changed in BIOS
Certain changes in BIOS settings (such as chipset timing or latency, memory timing or latency, processor clock frequency, etc.) can cause a system to no longer boot.

If you are able to enter the BIOS Setup by pressing F2, reset the BIOS to factory defaults by pressing F9. Save and exit the BIOS Setup.

If you cannot enter the BIOS Setup, clear the CMOS:
  1. Turn off all peripheral devices connected to the computer.
  2. Disconnect the computer’s power cord from the AC power source (wall outlet or power adapter).
  3. Remove the computer cover.
  4. Locate the battery on the board (see figure below).
  5. With a medium flat-bladed screwdriver, gently pry the battery free from its connector. Note the orientation of the “+” and “-” on the battery.
  6. Wait one hour then replace the battery.
  7. Replace the computer cover.
  8. Plug the computer and all devices back in.
You may also need to perform a BIOS Recovery after clearing the CMOS.


BIOS was Upgraded to Later Version
After a BIOS upgrade, a hard drive that originally was configured as IDE may revert to the default value of AHCI, causing the system to no longer boot successfully into the operating system.

To resolve this problem, follow these steps:
  1. During boot, enter the BIOS setup by pressing F2.
  2. Set the drive configuration back to IDE. Depending on the board model, this setting can be found as follows:
    1. Go to the Advanced > Drive Configuration menu.
    2. Set Configure SATA As... to IDE.
Or
    1. Go to the SATA Drives menu.
    2. Set Chipset-SATA Mode to IDE.
  1. Press F10 to save and exit BIOS setup.



Other Boot Issues


Resolving Slow Boot Times
Check the following tips to speed up the boot time of your computer.
  • Set the hard drive as the first boot device in the boot order in the BIOS setup (Boot > Boot Device Priority menu).
  • Enable Intel® Rapid BIOS boot in the BIOS setup (Boot menu).
  • Disable Hard Disk Pre-Delay in the BIOS Setup (Advanced > Drive Configuration menu).
  • Disable system functions and features if you do not need them. Examples include:
    • Legacy USB - this must be enabled if you use a USB keyboard or USB mouse outside the Windows* environment (Advanced > USB Configuration).
    • Unused I/O ports, such as serial, parallel and IEEE-1394 ports (Advanced > Peripheral Configuration menu).
    • Event logging (Advanced > Event Log Configuration menu).
To enter BIOS Setup, press the <F2> key after the Power-On Self-Test (POST) memory test begins and before the operating system boot begins.
Warning
If any problems occur after making BIOS settings changes (poor performance, intermittent issues, etc.), reset the desktop board to default values:
  1. During boot, enter the BIOS setup by pressing F2.
  2. Press F9 to set defaults.
  3. Press F10 to Save and Exit.
If the system locks or won’t boot after making BIOS settings changes, perform a BIOS recovery as described at Instructions for Recovery BIOS Update.

Refer to Optimization Tip - Device Boot Order for additional information on reducing boot times.


BIOS Beep Codes
Refer to BIOS Beep Codes for troubleshooting tips for when you hear beep codes and your desktop board does not boot up successfully.


Port 80h POST Codes
Refer to Port 80h POST Codes for information regarding beep codes, error messages and POST codes associated with BIOS versions based on Extensible Framework Interface (EFI).


Error "PXE-E61 Media Test Failure" at Boot
The error PXE-E61 Media Test Failure can occur at boot, if all the following are true:
  • Boot to LAN is enabled in BIOS Setup.
  • A network cable/connection is not present.
  • Network Boot is in the boot order before a present boot device.
To resolve this, remove Boot to LAN from the list of boot devices in BIOS Setup.
This applies to:
Intel® Desktop Board D102GGC2
Intel® Desktop Board D201GLY
Intel® Desktop Board D201GLY2
Intel® Desktop Board D410PT
Intel® Desktop Board D510MO
Intel® Desktop Board D5400XS
Intel® Desktop Board D845BG
Intel® Desktop Board D845EBG2
Intel® Desktop Board D845EBT
Intel® Desktop Board D845EPI
Intel® Desktop Board D845EPT2
Intel® Desktop Board D845GBV
Intel® Desktop Board D845GEBV2
Intel® Desktop Board D845GERG2
Intel® Desktop Board D845GLAD
Intel® Desktop Board D845GLLY
Intel® Desktop Board D845GLVA
Intel® Desktop Board D845GRG
Intel® Desktop Board D845GVAD2
Intel® Desktop Board D845GVFN
Intel® Desktop Board D845GVSR
Intel® Desktop Board D845HV
Intel® Desktop Board D845PEBT2
Intel® Desktop Board D845PEMY
Intel® Desktop Board D845PESV
Intel® Desktop Board D845PT
Intel® Desktop Board D845WN
Intel® Desktop Board D848PMB
Intel® Desktop Board D850EMD2
Intel® Desktop Board D850EMV2
Intel® Desktop Board D850GB
Intel® Desktop Board D850MD
Intel® Desktop Board D850MV
Intel® Desktop Board D865GBF
Intel® Desktop Board D865GLC
Intel® Desktop Board D865GRH
Intel® Desktop Board D865GSA
Intel® Desktop Board D865GVHZ
Intel® Desktop Board D865PCD
Intel® Desktop Board D865PCK
Intel® Desktop Board D865PERL
Intel® Desktop Board D875PBZ
Intel® Desktop Board D910GLDW
Intel® Desktop Board D915GAG
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Wi-Fi Tutorial
[Getting Connected]

Related Terms
SSID
Ad-hoc mode
WEP
Related Resources
Mobile workers must know how to set up their mobile gear to connect to Wi-Fi locations. Using Windows XP in this tutorial, we'll go through the steps for setting up a laptop to access a Wi-Fi network. Some Wi-Fi cards can be set to automatically detect and connect to Wi-Fi networks. It is still important to know how to manually set up your Wi-Fi card to connect to a Wi-Fi network.
  1. Before you attempt to use any Wi-Fi network, find out what the SSID, Channel, Mode and WEP keys are. Some Wi-Fi locations do not require a WEP key. Many Wi-Fi providers have this information on their Web site or when you purchase access you will be provided the information.
  2. Ensure you have a firewall program installed and running. This will protect your data.
  3. Start up your laptop and look for the Wi-Fi network icon in the bottom right of the screen.
  4. Click on the Wifi Connection icon on the bottom right of screen and you should see a window that indicates connection, strength and duration. Click on the Properties tab.
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  1. The next window will show the type of networking card installed. Click on the Wireless Networks tab.

  2. Once the Wireless Network Connection Properties window is open, you will have two options depending on how you set up your laptop.
    • If you do not see any networks listed in Preferred or Available Networks, you will have to manually add the SSID. Click on Add. You will have to enter the SSID and WEP key (if required). Click OK and you should then see the network you just added in the Available Networks box.


    • If you see the correct SSID showing in the Available Networks, then you need to click on Configure in order to enter the WEP key if that is required.


  1. In the next window, enter the SSID for the Wi-Fi network you want to access. Make sure you do not have CAPS lock or NUM lock while entering the information. If a network key is required, click on "Data Encryption and then enter the Network key you have been provided with. Again make sure you do not have CAPS or NUM lock on. Click OK when entered. If you have entered the key incorrectly a message will pop up and you will need to re-enter the key.

  2. Next go to Start, and where it says Connect To, click on that and you should see choices like in the graphic below. Click on Wireless Network Connection and it should work.


There are occasions when the connection doesn't work. In these cases check your firewall software and make sure it allows you to connect to the Wi-Fi network. To check this, disable your firewall software and check the connection again. If you can connect with the firewall program disabled, you change your settings. If your firewall program is not the problem check the SSID and WEP key information that you entered. Both of these are case sensitive. If you had obtained SSID information from the Internet, check with someone in the establishment to see if the SSID has been changed.


Wi-Fi Preparation

What You Need to Connect

Wireless Network Screen
Mobile workers must know how to set up their mobile gear to connect to Wi-Fi locations. Using Windows XP in this tutorial, we'll go through the steps for setting up a laptop to access a Wi-Fi network. Some Wi-Fi cards can be set to automatically detect and connect to Wi-Fi networks, though it is still important to know how to manually set up your Wi-Fi card to connect to a wireless network.
·  Before you attempt to use any Wi-Fi network, find out what the SSID, Channel, Mode and WEP keys are. Some Wi-Fi locations do not require a WEP key. Many Wi-Fi providers have this information on their Web site or they'll give you the information when you purchase access.
·  Ensure you have a firewall program installed and running. This will protect your data.
·  Start up your laptop and look for the Wi-Fi network icon in the bottom right of the screen.
·  Click on the Wi-Fi Connection icon on bottom right of screen and you should see a window that indicates connection, strength and duration. Click on the Properties tab.

Network Card Properties

Configuring a Wi-Fi Network
Configuring a Wi-Fi Network
Photo Credit: ©Catherine Roseberry
This window shows the type of networking card installed. Click on the Wireless Networks tab.

Adding a Network Connection

Entering a new SSID network connection
Entering a new SSID network connection
Photo Credit: ©Catherine Roseberry
Once the Wireless Network Connection Properties window is open, you will have two options depending on how you set up your laptop.
If you do not see any networks listed in Preferred or Available networks, you will have to manually add the SSID. Click on Add. You will have to enter the SSID and WEP key (if required). Click OK and you should then see the network you just added in the Available Networks box.

Using an Available Network

Configuring SSID for an existing network
Configuring SSID for an available network.
If you see the correct SSID showing in the Available Networks, then you need to click on Configure in order to enter the WEP key if that is required.

Entering SSID and WEP Key

Entering SSID and WEP Key
Entering SSID and WEP Key
Photo Credit: ©Catherine Roseberry
In this window, enter the SSID for the Wi-Fi network you want to access. Make sure you do not have CAPS lock or NUM lock while entering the information.
If a Network key is required, click on "Data Encryption and then enter the Network key you have been provided with. Again make sure you do not have CAPS or NUM lock on. Click OK when entered. If you have entered the key incorrectly, a message will pop up and you will need to re-enter the key.

Making the Connection

Connecting to the Wi-Fi Network
Wi-Fi Connection
Photo Credit: ©Catherine Roseberry
Next go to Start - and where it says Connect To click on that and you should see choices similar to the graphic below. Click on Wireless Network Connection and it should work.
Potential Problems & Their Solutions:
There are occasions when the connection doesn't work. In these cases check your firewall software and make sure it allows you to connect to the Wi-Fi network. To check this, disable your firewall software and check the connection again. If you can connect with the firewall program disabled, you will need to change your firewall settings. If your firewall program is not the problem, check the SSID and WEP key information that you entered. Both of these are case sensitive. If you had obtained SSID information from the Internet, check with someone in the establishment to see if the SSID has been changed.

4 steps to set up your home wireless network

You can use a wireless network to share Internet access, files, printers, and more. Or you can use it to surf the Web while you're sitting on your couch or in your yard. Plus, it's easier to install than you think.
man with a laptop in a hammock
Note: For Windows Vista users, we recommend installing Windows Vista Service Pack 1 before setting up your wireless network. For Windows XP users, we recommend installing Windows XP Service Pack 3. Although the service pack is not required for wireless networking, it does make things much easier and helps protect you against hackers, worms, and other Internet intruders.

1. Choose your wireless equipment

The first step is to make sure that you have the equipment you need. As you're looking for products in stores or on the Internet, you might notice that you can choose equipment that supports three different wireless networking technologies: 802.11a, 802.11b, and 802.11g. We recommend 802.11g, because it offers excellent performance and is compatible with almost everything.
Shopping list
·         Broadband Internet connection
·         Wireless router
·         A computer with built-in wireless networking support or a wireless network adapter
A wireless router
The router converts the signals coming across your Internet connection into a wireless broadcast, sort of like a cordless phone base station. Be sure to get a wireless router, and not a wireless access point.
A wireless network adapter
Network adapters wirelessly connect your computer to your wireless router. If you have a newer computer you may already have wireless capabilities built in. If this is the case, then you will not need a wireless network adapter. If you need to purchase an adapter for a desktop computer, buy a USB wireless network adapter. If you have a laptop, buy a PC card-based network adapter. Make sure that you have one adapter for every computer on your network.
Note: To make setup easy, choose a network adapter made by the same vendor that made your wireless router. For example, if you find a good price on a Linksys router, choose a Linksys network adapter to go with it. To make shopping even easier, buy a bundle, such as those available from D-Link, Netgear, Linksys, Microsoft, and Buffalo. If you have a desktop computer, make sure that you have an available USB port to plug the wireless network adapter into. If you don't have any open USB ports, buy a hub to add additional ports.

2. Connect your wireless router

Since you'll be temporarily disconnected from the Internet, print these instructions before you go any further.
First, locate your cable modem or DSL modem and unplug it to turn it off.
Next, connect your wireless router to your modem. Your modem should stay connected directly to the Internet. Later, after you've hooked everything up, your computer will wirelessly connect to your router, and the router will send communications through your modem to the Internet.
How to go wireless
Next, connect your router to your modem:
Note: The instructions below apply to a Linksys wireless router. The ports on your router may be labeled differently, and the images may look different on your router. Check the documentation that came with your equipment for additional assistance.
·         If you currently have your computer connected directly to your modem: Unplug the network cable from the back of your computer, and plug it into the port labeled Internet, WAN, or WLAN on the back of your router.
·         If you do not currently have a computer connected to the Internet: Plug one end of a network cable (included with your router) into your modem, and plug the other end of the network cable into the Internet, WAN, or WLAN port on your wireless router.
·         If you currently have your computer connected to a router: Unplug the network cable connected to the Internet, WAN, or WLAN port from your current router, and plug this end of the cable into the Internet, WAN, or WLAN port on your wireless router. Then, unplug any other network cables, and plug them into the available ports on your wireless router. You no longer need your original router, because your new wireless router replaces it.
wireless modem lights
Next, plug in and turn on your cable or DSL modem. Wait a few minutes to give it time to connect to the Internet, and then plug in and turn on your wireless router. After a minute, the Internet, WAN, or WLAN light on your wireless router should light up, indicating that it has successfully connected to your modem.


3. Configure your wireless router

wireless cables
Using the network cable that came with your wireless router, you should temporarily connect your computer to one of the open network ports on your wireless router (any port that isn't labeled Internet, WAN, or WLAN). If you need to, turn your computer on. It should automatically connect to your router.
Next, open Internet Explorer and type in the address to configure your router.
You might be prompted for a password. The address and password you use will vary depending on what type of router you have, so refer to the instructions included with your router.
As a quick reference, this table shows the default addresses, usernames, and passwords for some common router manufacturers.
Router
Address
Username
Password
3Com
http://192.168.1.1
admin
admin
D-Link
http://192.168.0.1
admin
 
Linksys
http://192.168.1.1
admin
admin
Microsoft Broadband
http://192.168.2.1
admin
admin
Netgear
http://192.168.0.1
admin
password
Internet Explorer will show your router's configuration page. Most of the default settings should be fine, but you should configure three things:
1.      Your wireless network name, known as the SSID. This name identifies your network. You should choose something unique that none of your neighbors will be using.
2.      Wireless encryption (WEP) or Wi-Fi Protected Access (WPA), which help protect your wireless network. For most routers, you will provide a passphrase that your router uses to generate several keys. Make sure your passphrase is unique and long (you don't need to memorize it).
3.      Your administrative password, which controls your wireless network. Just like any other password, it should not be a word that you can find in the dictionary, and it should be a combination of letters, numbers, and symbols. Be sure you can remember this password, because you'll need it if you ever have to change your router's settings.
The exact steps you follow to configure these settings will vary depending on the type of router you have. After each configuration setting, be sure to click Save Settings, Apply, or OK to save your changes.
Now, you should disconnect the network cable from your computer.

4. Connect your computers to the wireless network

·         Windows 7
·         Windows Vista
If your computer does not have wireless network support built in, plug your network adapter into your USB port, and place the antenna on top of your computer (in the case of a desktop computer), or insert the network adapter into an empty PC card slot (in the case of a laptop). Windows will automatically detect the new adapter, and may prompt you to insert the CD that came with your adapter. The on-screen instructions will guide you through the configuration process.