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Compaq Professional Workstation AP500 Maintenance and Service Guide
Managing a Diagnostics Partition
This option allows you to create, delete, or upgrade the diagnostics software on the hard drive
partition. This must be performed from a diagnostics diskette.
CAUTION: Creating a diagnostics partition involves performing a low-level
format on the hard drive. Normally, this is only done to add diagnostics to a
replacement hard drive. If the diagnostics software is deleted, you will no longer
be able to access the Compaq Utilities menu.
CAUTION: If you install an operating system without first installing the
diagnostics partition, you will not be able to install a diagnostics partition without
losing all data on your hard disk.
Diagnostic Error Codes
Diagnostic error codes occur if the system recognizes a problem while running the Compaq
Setup and Diagnostics utilities. These error codes help identify defective subassemblies.
The following tables list possible error codes, descriptions of each error condition, and actions
required to resolve the error condition. For assistance in the removal and replacement of a
particular subassembly, see Chapter 3.
NOTE: Retest the system after completing each step. If the problem has been resolved, do not
proceed with the remaining steps.
If you encounter an error condition, complete the following steps before starting problem
isolation procedures:
1. Ensure proper ventilation. The workstation should have a 6-inch (15 cm) clearance at the
rear of the chassis.
2. Turn off the workstation and peripheral devices.
CAUTION: Always make sure that the power is off before disconnecting or
reconnecting the mouse, keyboard, or any other peripheral devices. Disconnecting
or connecting any peripheral devices while the unit power is on can damage the
system board.
3. Disconnect any peripheral devices other than the monitor and keyboard. Do not
disconnect the printer if you want to test it or use it to log error messages.
4. Install loop-back and terminating plugs for complete testing.
5. Run the Diagnostics diskette.