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Chapter 2 Troubleshooting Procedures
2.13 HDMI Troubleshooting
To check if the computer’s HDMI is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: External HDMI Monitor Check
Procedure 2: Connector and Cable Check
Procedure 3: Replacement Check
Procedure 1 Connector Check and Replacement Check
The HDMI port is connected to system board. If HDMI malfunctions, its connection is
defective and system board may be faulty.
Check 1 Make sure HDMI cable is firmly connected to the connector CN15/CN17 (system
board). If the problem still occurs, perform Procedure 2.
Procedure 2 External Monitor Check
Connect an external monitor to the computer’s HDMI port, and then boot the computer. The
computer automatically detects the external monitor.
If the external monitor works correctly, the internal LCD may be faulty. Go to Procedure 3.
If the external monitor appears to have the same problem as the internal monitor, system
board may be faulty. Go to Procedure 2.
Satellite L600D/L640D/L645D, Satellite Pro L600D/Pro L640D/Pro L645D Maintenance Manual (960-Q08)