IBM 8676 - Eserver xSeries 335 Hardware Maintenance Manual And Troubleshooting Manual page 100

Note: See "System" on page 112 to determine which components should be replaced by a field service technician.
Expansion enclosure problems
Symptom
The SCSI expansion enclosure
used to work but does not work
now.
Note: See "System" on page 112 to determine which components should be replaced by a field service technician.
Hark disk drive problems
Symptom
Not all drives are recognized by
the hard disk drive diagnostic
test (Fixed Disk test).
System stops responding during
hard disk drive diagnostic test.
Note: See "System" on page 112 to determine which components should be replaced by a field service technician.
General problems
Symptom
Problems such as broken cover
locks or indicator LEDs not
working
Note: See "System" on page 112 to determine which components should be replaced by a field service technician.
Intermittent problems
Symptom
A problem occurs only
occasionally and is difficult to
detect.
90
xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide
FRU/action
1. Verify that:
v The cables for all external SCSI options are connected correctly.
v The last option in each SCSI chain, or the end of the SCSI cable, is
terminated correctly.
v Any external SCSI option is turned on. You must turn on an external SCSI
option before turning on the server.
2. For more information, see your SCSI expansion enclosure documentation.
FRU/action
1. Remove the first drive not recognized and try the hard disk drive
diagnostic test again.
2. If the remaining drives are recognized, replace the drive you removed with a
new one.
1. Remove the hard disk drive being tested when the server stopped
responding and try the diagnostic test again.
2. If the hard disk drive diagnostic test runs successfully, replace the drive you
removed with a new one.
FRU/action
v Broken CRU/FRU
FRU/action
1. Verify that:
v All cables and cords are connected securely to the rear of the server and
attached options.
v When the server is turned on, air is flowing from the rear of the server at the
fan grill. If there is no airflow, the fan is not working. This causes the server
to overheat and shut down.
v Ensure that the SCSI bus and devices are configured correctly and that the
last external device in each SCSI chain is terminated correctly.
2. Check the system error log.