Toshiba Tecra A8 Maintenance Manual - Page 114

2 Troubleshooting Procedures 2.13 Wireless LAN Troubleshooting Procedure 2 Antenna Connection Check The wireless LAN wiring diagram is shown below: Any of the connections may be disconnected. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures, and perform the following checks: Check 1 Make sure the wireless LAN card is firmly connected to CN2600 on the system board. If the connector is disconnected, connect it firmly and go to Procedure 1. If the wireless LAN card is still not functioning properly, perform Check 2. Check 2 Make sure the wireless LAN antenna cables are firmly connected to the wireless LAN card. If the wireless LAN antenna cables are disconnected, connect them firmly and go to Procedure 1. If the wireless LAN card is still not functioning properly, go to Procedure 3. Procedure 3 Replacement Check The wireless LAN antenna, wireless LAN card and the system board are connected to the circuits. Any of these components may be damaged. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks: Check 1 Check 2 Check 3 The wireless LAN card may be defective or damaged. Replace it with a new one following the steps in Chapter 4, Replacement Procedures. If the problem still exists, perform Check 2. The wireless LAN antenna may be defective or damaged. Replace the antenna with a new one following the steps in Chapter 4, Replacement Procedures. If the problem still exists, perform Check 3. The system board may be defective or damaged. Replace the board with a new one following the instructions in Chapter 4, Replacement Procedures and test the display again. 2-66 [CONFIDENTIAL] TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)