IBM 8671 Hardware Maintenance Manual - Page 150
CRU/FRU
UPC - 087944734307
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Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Diskette drive problems Symptom FRU/action Diskette drive activity LED stays 1. If there is a diskette in the drive, verify that: on, or the system bypasses the v The diskette drive is enabled in the Configuration/Setup utility program. diskette drive. v The diskette is good and not damaged. (Try another diskette if you have one.) v The diskette is inserted correctly in the drive. v The diskette contains the necessary files to start the computer. v The software program is working properly. v The cable is installed correctly (in the proper orientation). 2. To prevent diskette drive read/write errors, be sure the distance between monitors and diskette drives is at least 76 mm (3 in.). 3. Run diskette drive diagnostics. 4. Cable. 5. Diskette drive. 6. System board. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Expansion enclosure problems Symptom FRU/action The SCSI expansion enclosure used to work but does not work now. 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 computer. 2. For more information, see your SCSI expansion enclosure documentation. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Hard disk drive problems Symptom FRU/action Not all drives are recognized by 1. Remove the first drive not recognized and try the hard disk drive the hard disk drive diagnostic diagnostic test again. test (Fixed Disk test). 2. If the remaining drives are recognized, replace the drive you removed with a new one. System stops responding during 1. Remove the hard disk drive being tested when the computer stopped hard disk drive diagnostic test. 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. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. General problems Symptom FRU/action Problems such as broken cover v Broken CRU/FRU locks or indicator LEDs not working 140 xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide