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Start
This is the entry point for all check procedures.
The check procedures use failure symptoms, Power-On Self Test (POST) error codes, or beeps to help
determine the defective field replaceable unit (FRU).
Follow the suggested check procedures or use the diagnostics diskette to determine the problem FRU.
-IMPORTANT- Replace FRUs ONLY when it is determined that the error is not a
result of software, loose contacts, or dirty component surfaces.
Any FRU change should be verified by running a complete test ('Diagnostics - All Tests' in PC-Doctor diagnostics program).
This book comes with a diagnostic program diskette.
This diskette should be used ONLY with 2170/2171/2172 Service Level A (SL-A) IBM Aptiva Personal
Computers. Do not use this diskette on other models.
POST error codes and error messages are displayed on the screen after the IBM logo.
Meanwhile, error beeps could be issued to help diagnose system problem.
Please refer to 'Index of Symptoms, Messages, Error Codes, or Beeps' for additional help.
All voltages in the check procedures are positive unless otherwise indicated.
Use frame ground for all voltage checks unless otherwise specified.
-IMPORTANT- There is a Power Override switch located at the back of the
machine, just above the connector for the power cable.
If the system does not power on after pressing the power button situated on the front of the machine, please check the power cable and the Power Override
switch.
If the Power Override switch is switched on, no power is supplied to the system.
NOTE: If the check procedures instruct you to replace a FRU and the error message persists, an option adapter card might be causing the failure.
Remove all option adapter cards, one at a time, until the error changes or the problem is no longer apparent. Replace the last option adapter
card removed.
The hard disk drive contains pre-loaded software. Refer to 'Software Recovery Procedure', to reinstall the original software.
Be sure to reload the software on the primary hard disk drive (Drive C) when replacing it.
-IMPORTANT- The drives in the system you are servicing may have been
rearranged, or the drive startup sequence has changed.
Be extremely careful during write operations, such as copying, saving, or formatting.
Data or programs can be overwritten if you select an incorrect drive.
Ask the customer to back up any additional software from the hard disk drive before you reload the software.
How to Diagnose Combined FRUs: If an adapter or device consists of more
than one FRU, any of the FRUs might cause an error code.
Before replacing the device or adapter, remove the FRUs one by one to see if the symptoms change.
If a newly replaced FRU does not correct the problem: If you have reached
this point of the check procedures and were instructed to replace a FRU but doing so did not correct the problem, reinstall the original FRU and go through
'Start' again.
If you want to print a copy of a BIOS Setup Utility screen to an attached printer, press Print Screen key while the following screen is displayed.
READ THE FOLLOWING:
Human Error is a cause for concern when applied to check procedures. It
exists in every first time set of analysis procedures. It is therefore
essential for effective and time-efficient servicing that each stage of
every procedure be verified. (For example: When a symptom is found, or
when a symptom appears to have been cured, the preceding steps
should be repeated for accuracy of analysis.)
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.