Step 1540-11 - IBM RS/6000 44P 270 Service Manual

Step 1540-11

The system is working correctly with this configuration. One of the SCSI devices that
you disconnected might be defective.
1. Make sure the diagnostic CD-ROM is inserted into the CD-ROM drive.
2. Turn off the power and remove the power cable.
3. Connect the signal and power connectors to one of the SCSI devices (CD-ROM
drive, tape drive, disk drive, and so on.) Do not connect the signal and power
connectors to the backplane at this time.
4. Plug in the power cable (and wait for OK on the operator panel display).
5. Turn on the power.
6. After the keyboard indicator is displayed, press the F5 key on the directly attached
keyboard or the number 5 key on an ASCII terminal keyboard.
7. Enter the appropriate password if you are prompted to do so.
Is the "Please define the System Console" screen displayed?
NO
YES
One of the FRUs remaining in the system unit is defective.
In the following order, exchange the FRUs that have not been exchanged.
1. SCSI cable
2. Last SCSI device connected (CD-ROM drive, tape drive, and so on)
3. I/O board (see note 4 on page 27)
4. Processor card
5. Power supply.
Repeat this step until the defective FRU is identified or all the FRUs have been
exchanged.
If the symptom did not change and all the FRUs have been exchanged, call
service support for assistance.
If the symptom has changed, check for loose cards, cables, and obvious
problems. If you do not find a problem, return to "Step 1540-1" on page 51 in
this MAP and follow the instructions for the new symptom.
Repeat this step, adding one SCSI device at a time, until all the SCSI devices
that were attached to the integrated SCSI adapter, except the backplane, are
connected and tested.
Go to "Step 1540-12" on page 60.
Chapter 3. Maintenance Analysis Procedures
59