Lenovo NetVista Hardware Maintenance Manual (HMM) for Aptiva and NetVista 2255 - Page 69

Error Symptoms, Action/FRU, Keyboard, Power Supply, Other Problems

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Table 2-3 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. Keyboard Some or all keys on keyboard do "Keyboard" on page 78. not work. Power Supply Pressing power switch cannot turn off system. (Only unplug power cord from electrical outlet can turn off system.) Pressing power switch cannot turn on system. See "Power Management Setup" on page 47. Power switch cable assembly "Power Supply" on page 81. System board Check the voltage selector on the power supply if it is off. Power switch cable assembly. Executing software shutdown from Windows98 Start menu cannot turn off system. (Only pressing power switch can force system to turn off). Load default settings. Reload software from Recovery CD. No system power, or power supply fan is not running. Any other problems. "Power Supply" on page 81. System board. Other Problems "Undetermined Problems" on page 84. 69

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69
Table 2-3
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.
Keyboard
Some or all keys on keyboard do
not work.
“Keyboard“ on page 78.
Power Supply
Pressing power switch cannot
turn off system. (Only unplug
power cord from electrical outlet
can turn off system.)
See ”Power Management Setup” on page 47.
Power switch cable assembly
"Power Supply" on page 81.
System board
Pressing power switch cannot
turn on system.
Check the voltage selector on the power supply if it is off.
Power switch cable assembly.
Executing software shutdown
from Windows98 Start menu
cannot turn off system. (Only
pressing power switch can
force system to turn off).
Load default settings.
Reload software from Recovery CD.
No system power, or power
supply fan is not running.
"Power Supply" on page 81.
System board.
Other Problems
Any other problems.
“Undetermined Problems” on page 84.