Toshiba Tecra A3-S711 Maintenance Manual - Page 57

2 Troubleshooting Procedures 2.8 Printer Port Troubleshooting To determine if the computer's printer (parallel) port is functioning properly, perform the following procedures. Figure 2-8 outlines the process. Start with Procedure 1 and continue as instructed. Procedure 1: Diagnostic check Procedure 2: Printer port loopback check Procedure 3: Replace system board Procedure 1 Diagnostic check Attach the printer port loopback connector firmly to the printer port and run the Diagnostic Program. See Chapter 3 for details. 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 port loopback check 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 sho uld 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. Replace it with a new one following the instructions in Chapter 4. 2-22 Tecra A3/S2 Series Maintenance Manual