804-800.03

Introduction

804-800.03 is a reference to the IBM Personal Computer/AT (PC/AT) BIOS POST (Power-On Self-Test) error code that indicates a failure to initialize the system timer.

The system timer is a critical component of the computer system and failure to initialize it can result in various issues including system instability, performance degradation, and failure to boot.

Possible Causes

There can be several reasons why the system timer may fail to initialize including:

• Incorrect jumper settings
• Damaged or defective system timer chip
• Corrupted BIOS settings
• Power supply issues
• Hardware conflicts

Troubleshooting Steps

To troubleshoot the 804-800.03 error, try the following steps:

1. Check the jumper settings on the motherboard to ensure they are correctly set.
2. Test the system timer chip with a multimeter to determine if it is functioning correctly.
3. Reset the BIOS settings to their default values.
4. Check the power supply and ensure it is providing adequate power to the system.
5. Remove any recently added hardware or devices and test if the error persists.

Conclusion

The 804-800.03 error can be a frustrating and difficult issue to resolve, but by following the troubleshooting steps outlined above, you can isolate and resolve the underlying issue.

It is worth noting that in some cases, the issue may be due to a hardware failure that cannot be resolved through software or configuration changes, and in such cases, professional hardware repair may be necessary.