Toshiba Satellite A660-BT3G25X Maintenance Manual - Page 87

2Troubleshooting Procedures To determine if the computer's CRT port is functioning properly, perform the following procedures. Figure 2-17 outlines the process. Start with Procedure 1 and continue as instructed. Procedure 1: CRT connection check Procedure 2: CRT set check Procedure 1 CRT connection check The CRT cable may be damaged or the connections may be loose. Use windows application to check device can work fine or not. Perform Check 1: Check 1 Make sure CRT cable is firmly plugged into both the CRT set and the CRT port of the computer. If the cable is connected correctly, go to Check 2. Check 2 Make sure the CRT port is firmly secured to the system board of the computer. If the malfunction remains, go to Check 3. Check 3 The CRT cable may be damaged. Replace with a good cable. If the malfunction remains, go to Procedure 2. Procedure 2 CRT set check The CRT set may be faulty. Perform Check 1: Check 1 Try using the set for CRT reception. If it does not work, the set may be damaged. If the set does work, perform Check 2. Check 2 Try connecting a different CRT to the computer. If the replacement CRT works, the original set may be damaged. If the replacement set does not work the system board may be damaged. Replace it with a new one following the instructions in Chapter 4. SatelliteA660/ProA660 Series Maintenance Manual 53