IBM Aptiva Hardware Maintenance Manual page 76

Table 2- 2 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.
Display changing colors.
Display problem not listed
above (including blank or
illegible monitor).
NOTE: Execute "Load BIOS Default Settings" in BIOS Setup to confirm
ports' presence before diagnosing any parallel/serial ports problems.
Serial or parallel port loop-
back test failed.
Printing failed.
Printer problems.
Action/FRU
Monitor signal connection/cable
Monitor
System board
"Monitor" on page 2-42.
System board
Parallel/Serial Ports
Make sure that the LPT# or COM# you test is
the same as what you set in BIOS Setup.
See "Serial Port Addresses" on page 1-13
and "Parallel Port Addresses" on page 1-
14.
Loop-back.
System board.
Ensure that the printer driver is properly
installed.
Refer to the service manual for the printer.
Printer.
Printer cable.
System board.
Refer to the service manual for the printer.
Check Procedures 2-23