Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 124

Running Diagnostic Utilities for Error Codes, appears on the screen when POST completes

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4-30 Compaq Professional Workstation AP550 Maintenance and Service Guide Running Diagnostic Utilities for Error Codes Diagnostics utilities error codes help identify possibly defective subassemblies. The following tables list possible error codes, descriptions of each error condition, and actions required to resolve the error condition. See Chapter 3, Removal and Replacement Procedures, for assistance in the removal and replacement of a particular subassembly. 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 3-inch clearance at the rear of the chassis. 2. Turn off the workstation and peripheral devices. CAUTION: Be sure 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. Delete the Power-On Password, if set. If a key icon ( ) appears on the screen when POST completes, the Power-On Password is set. If this occurs, you must enter the password to continue. To delete the password, type the current password, then press Enter. If you do not have access to the password, you must disable it through the SW50 switch on the system board. 5. Install loop-back and terminating plugs for complete testing. 6. Run the Diagnostics diskette.

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4-30
Compaq Professional Workstation AP550 Maintenance and Service Guide
Running Diagnostic Utilities for Error Codes
Diagnostics utilities error codes help identify possibly defective subassemblies.
The following tables list possible error codes, descriptions of each error condition, and actions
required to resolve the error condition. See Chapter 3, Removal and Replacement Procedures,
for assistance in the removal and replacement of a particular subassembly.
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 3-inch clearance at the rear of
the chassis.
2.
Turn off the workstation and peripheral devices.
CAUTION:
Be sure 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.
Delete the Power-On Password, if set.
If a key icon (
) appears on the screen when POST completes, the Power-On Password
is set. If this occurs, you must enter the password to continue. To delete the password,
type the current password, then press
Enter.
If you do not have access to the password,
you must disable it through the SW50 switch on the system board.
5.
Install loop-back and terminating plugs for complete testing.
6.
Run the Diagnostics diskette.