Compal ACY25 series, Руководство по обслуживанию

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To determine if the computer’s printer (parallel) port is functioning properly, perform the
following procedures. Figure 6-8 outlines the process. Start with Procedure 1 and continue
as instructed.
Procedure 1: Diagnostic test
Procedure 2: Printer and connection test
Procedure 3: Replace system board
Procedure 1 Diagnostic test
Attach the printer port loopback connector firmly to the printer port and run the Diagnostic
Program. If the printer port test passes, there may be a problem with the printer. Go to
Procedure 2. If the printer port test fails, go to Procedure 3.
Procedure 2 Printer and connection test
The printer may be faulty or not connected properly. Perform Check 1.
Check 1 Make sure printer cable is firmly plugged into both the printer and the printer port
of the computer. If the cable is connected correctly, go to Check 2.
Check 2 Make sure the printer port is firmly secured to the system board of the computer. If
the malfunction remains, go to Check 3.
Check 3 The printer cable may be damaged. Replace with a good cable. If the malfunction
remains, go to Check 4.
Check 4 The printer may be faulty. Replace it with a good printer or connect it to a different
computer.
If the replacement printer works or the original printer does not work on a different computer,
the printer should be replaced.
If the replacement printer does not work either, or the original printer functions normally on a
different computer, go to Procedure 3.
Procedure 3 Replace system board
The system board may be damaged.
Chapter
6-20