HP 520 5/XX manual Error Diagnostics and Suggested Corrective Actions, HP/Phoenix Bios Description

4 Summary of the HP/Phoenix BIOS

HP/Phoenix BIOS Description

Before flashing, it is necessary to disable the “Secure Mode” switch on the system switches, and to type in the System Administrator Password when starting up the computer. The PCI and PnP information is erased in the process.

Do not switch off the computer until the system BIOS update procedure has completed, successfully or not, since irrecoverable damage to the ROM may otherwise be caused. While updating the flash ROM, the power supply switch and the reset button are disabled to prevent accidental interruption of the flash programming process.

When installing a new system board, the ROM will have a blank serial number field. This will be detected automatically by the BIOS. Depending on the type of system board, you may or may not be prompted to enter the serial number. The serial number is printed on the identification label on the back of the PC.

Error Diagnostics and Suggested Corrective Actions

The programs and data in the system ROM are accompanied by a check-sum code. If any of the programs or data ever become corrupted, the check-sum will not correspond with the contents of the ROM, and the appropriate part of the POST routine will attempt to report the error:

Cannot display error messages

Flash ROM may be defective

The suggested corrective action is to reprogram the system ROM by running the same utility as is normally used for upgrading it.

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