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Chapter 2 Troubleshooting Procedures
Satellite L600D/L640D/L645D, Satellite Pro L600D/Pro L640D/Pro L645D Maintenance Manual (960-Q08)
Procedure 4 Replacement Check
HDMI signals are connected to display circuits via HDMI cable and HDMI&USB board. Any
of these components may be faulty. Refer to Chapter 4, Replacement Procedures, for
instructions on how to disassemble the computer and then perform the following checks:
If characters or graphics on the internal display are not displayed clearly, perform
Check 1.
If some screen functions do not operate properly, perform Check 4.
Check 1 HDMI cable may be faulty. Replace HDMI cable with a new one following the
instructions in Chapter 1, Replacement Procedure and test the display again. If the
problem still occurs, perform Check 2.
Check 2 HDMI monitor may be faulty. Replace HDMI monitor with a new one following
the instructions in Chapter 2, Replacement Procedure and test the display again. If
the problem still occurs, perform Check 3
Check 3 HDMI&USB board may be faulty. Replace it with a new one following the
instructions in Chapter 3, Replacement Procedure.
Check 4 System board may be faulty. Replace it with a new one following the instructions
in Chapter 4, Replacement Procedure.