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Table 2-3
Error Symptoms List
Error Symptoms
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 LED fails to
light, but system operates
normally.
NOTE: Make sure 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-ROM drive LED doesn't
come on but works normally.
CD-ROM drive cannot load or
eject when the system is
turned on and its eject
button is pressed and held.
CD-ROM drive does not read
and there are no error codes
or messages are displayed.
2-18
Action/FRU
With the system power on, measure the
voltage of hard disk LED connector JP7 (See
"Machine Type 2156 System Board Layout"
on page 5-3). Its reading should be:
CN9
HDD Idle/Active
pin-5
0 Vdc / 0 Vdc
pin-7
+5 Vdc / +5 Vdc
Hard drive LED cable.
CD-ROM Drive
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
CD-ROM drive power.
"CD-ROM Drive" on page 2-30.
CD-ROM drive
CD may have dirt or foreign material on it.
Check with a known good disc.
Make sure that the CD-ROM driver is
installed properly.
CD-ROM drive.
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