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52 IBM Desktop System HMM
Real-Time Clock
Real-time clock is
inaccurate.
Ensure that the information
in the Date and Time of
BIOS Setup is set correctly.
See “Date and Time” on
page 21.
Load default settings.
CMOS battery.
System board
Video and Monitor
Video memory test failed.
Video adapter failed.
Remove all non factory-
installed cards.
Load default settings
(if screen is readable).
System board
Display problem:
- Incorrect colors
- No high intensity
- Missing, broken, or
incorrect characters
- Blank monitor(dark)
- Blank monitor(bright)
- Distorted image
- Unreadable monitor
- Other monitor problems
Monitor signal connection/
cable.
Monitor
System board
Display changing colors. Monitor signal connection/
cable
Monitor
System board
Display problem not listed
above (including blank or
illegible monitor).
“Monitor” on page 70.
Load default settings
(if screen is readable).
System board
USB Ports
NOTE:
Execute “Load BIOS Default Settings” in BIOS
Setup to confirm ports presence before diagnosing any
USB ports problems. Remove all external USB hubs.
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