IBM Aptiva 2158, Hardware Maintenance Service, Page: 76 / 222

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Hard disk drive write error. Enter BIOS Setup and Load default settings.
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 CN2 for 2158 or CN14 for
2163/2164. The reading should be:
2158(CN2) 2163/2164(CN14) HDD Idle/Active
pin-4
pin-1 +5 Vdc / --
pin-5 pin-2 +5 Vdc / 0 Vdc
pin-6 pin-3 +5 Vdc / 0 Vdc
pin-7 pin-4 +5 Vdc / --
See “Machine Type 2158 System Board Jumpers
and Connectors” on page 131 and “Machine Type
2163 and 2164 System Board Jumpers and
Connectors” on page 135.
Hard drive LED cable.
CD/DVD-ROM Drive
NOTE:
Ensure CD/DVD-ROM drive is configured correctly in BIOS Setup, cable/
jumper are set correctly and its laser beam is clean before diagnosing any
CD/DVD-ROM drive problems.
CD/DVD-ROM drive LED
flashes for more than 30
seconds before LED shutting
off.
Software asks to reinstall disc.
Software displays a reading
CD/DVD error.
CD/DVD may have dirt or foreign material on it.
Check with a known good disc.
CD/DVD is not inserted properly.
CD/DVD is damaged.
CD/DVD-ROM drive LED
doesn't come on but works
normally. CD/DVD-ROM drive
Table 2-3 Error Symptoms List
(Continued)
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.
Error Symptoms Action/FRU