IBM 265, Service Manual

Page: 76 / 365

Purpose of this MAP
This MAP is used to locate defective FRUs not found by normal diagnostics. For this
procedure, diagnostics are run on a minimally configured system. If a failure is detected
on the minimally configured system, the remaining FRUs are exchanged one at a time
until the failing FRU is identified. If a failure is not detected, FRUs are added back until
the failure occurs. The failure is then isolated to the failing FRU.
When directed to exchange a FRU that is common to a FRU removed to create a
minimum configuration system, use one of the removed FRUs instead of a new FRU.
For example, if the system contains 16 memory modules and you are directed to
remove 14 of them to create a minimun configuration system, then use one of the
removed memory modules when exchanging the FRU. Once the failing FRU is isolated,
replace it with a new one.
Step 1540-1
1. Insert the diagnostic CD-ROM into the CD-ROM drive.
Note: If you cannot insert the diagnostic CD-ROM, go to “Step 1540-2” on page 61.
2. Ensure that the diagnostics and the operating system are shut down.
3. Turn off the power.
4. Turn on the power.
5. When the keyboard indicator is displayed (the word keyboard on an ASCII terminal
or the keyboard icon on a graphical display), press the F5 key on the directly
attached keyboard or the number 5 key on an ASCII terminal.
6. Enter the appropriate password if you are prompted to do so.
Is the
″
Please define the System Console
″
screen displayed?
NO Go to “Step 1540-2” on page 61.
YES Go to “Step 1540-18” on page 75.
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Service Guide