IBM Aptiva, Hardware Maintenance Manual, Page: 73 / 282

2-20
Table 2- 2 Error Symptoms List
Error Symptoms Action/FRU
NOTE: To diagnose a problem, first find the error symptom in the left
column. If directed to a check procedure, replace the FRU indicated in the
check procedure. If no check procedure is indicated, the first Action/FRU
listed in right column is the most likely cause.
Hard disk drive format error. Hard disk drive cable.
Hard disk drive.
System board.
Hard disk drive write error. Hard disk drive.
Hard disk drive LED fails to
light, but system operates
normally.
With the system power on, measure the
voltage of hard disk LED connector CN12(
see “2137 System Board "on page 5-5) or
CN21 (see "2138 System Board Layout" on
page 5-15.. Its reading should be:
CN12(for 2137) HDD Idle/Active
CN21(for 2138) HDD Idle/Active
pin-1
+5 Vdc / +5 Vdc
pin-2 +5 Vdc / 0 Vdc
pin-3 +5 Vdc / 0 Vdc
pin-4 +5 Vdc / +5 Vdc
Hard drive LED cable.
CD-ROM Drive
NOTE: Ensure CD-ROM drive is configured correctly in BIOS Setup,
cable/jumper are set correctly and its laser beam is clean before diagnosing
any CD-ROM drive problems.
CD-ROM drive LED flashes
for more than 30 seconds
before LED shutting off.
Software asks to reinstall
disc.
Software displays a reading
CD error.
CD may have dirt or foreign material on it.
Check with a known good disc.
CD is not inserted properly.
CD is damaged.
CD-ROM drive LED doesn’t
come on but works
normally.
CD-ROM drive