How to Troubleshoot a P4C800-E
The P4C800-E, made by ASUS, is a PC motherboard compatible with Pentium 4 processors. As with any motherboard, troubleshooting it can be difficult, and should only be attempted by someone with a knowledge of complex PC hardware. Most of the troubleshooting guidelines will depend on your knowledge of the function of particular connectors and pieces of hardware. Even if you do have a good knowledge of motherboard repair, you may still need to replace your motherboard.
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Instructions
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Check the Asus website at http://support.asus.com/Download.aspx?SLanguage=en&m=P4C800-E%20Deluxe&p=1&s=15 to see if you need any updated software for your motherboard.
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Remove the P4C800-E motherboard from your system. Be sure to ground yourself by touching a piece of metal before handling the motherboard.
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Check for obvious physical damage to the motherboard. Look for bent or disconnected pins or for obviously burnt circuits. Look for bulges in components like capacitors.
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Make sure that the CPU is properly locked into place. If the CPU is not properly seated, lift the thin white socket lever, remove and then reseat the CPU, and lower the socket lever until the lever clicks into place.
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Check the heat sink and the fan. Having a malfunctioning fan or heat sink could result in extremely high temperatures that cause permanent damage to the motherboard. If you believe the heat sink or fan are not working properly, replace them before using the motherboard again.
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Check the connectors. The P4C800-E features three sets of drive connectors: the 34-1 pin floppy disk drive connector, the 40-1 pin IDE connectors, and the 7-pin serial ATA connectors. For the 40-1 pin connectors, make sure that the red marking on the ribbon cable lines up with pin 1.
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Check any other internal connections, such as the front-panel audio connector (10-1 pin), and the internal audio connectors (4 pin).
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