Check Procedures Start - IBM Aptiva Series Hardware Maintenance

Check Procedures Start

This is the entry point for all check procedures. The check procedures
use failure symptoms, POST error codes, or beeps to help determine
the failing field replaceable unit (FRU). Follow the suggested check
procedures or use the Diagnostics Diskette to determine the problem
FRU.
Important: Do not replace an FRU unless you can determine the
error is not caused by software, loose-contact, or dirt on
component surface. Also, any change of the FRU should
be verified by a complete test ("Diagnostics \ All Test" in
PC-Doctor diagnostic program).
The diagnostics program comes on one diskette supplied with this
book. Use only this diskette for 2136 Service Level A (SL-A) IBM
Aptiva Personal Computers.
Note: The Diagnostics Diskette is not a bootable diskette. See
"Creating a Boot Diskette With Drivers" in "Diagnostic Aids" on
page 3-5 for detail information about making a bootable
Diagnostics Diskette.
The diagnostics program is intended to test only IBM products. Non-
IBM products, prototype cards, or modified options can give false
errors and invalid system responses.
All voltages in the check procedures are positive unless otherwise
shown. Use frame ground for all voltage checks unless otherwise
specified.
Note: If the check procedures instruct you to replace a FRU and the
error message remains the same, 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
Installation Procedure" on page 4-34 to reinstall the original software.
Be sure to reload the software on the primary hard disk drive (drive C)
when replacing it.
Note: The drives in the system you are servicing might have been
re- arranged, or the drive startup sequence, 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 take any action.
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