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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
LCD module, LCD cable are connected to display circuits. 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 2.
If LED backlight remains lit when the display is closed, perform Check 3.
Check1 LCD cable may be faulty. Replace LCD cable with a new one following the
instructions in Chapter 4, Replacement Procedure and test the display again. If the
problem still occurs, perform Check 2.
Check 2 LCD module may be faulty. Replace LCD module with a new one following the
instructions in Chapter 4, Replacement Procedure and test the display again. If the
problem still occurs, perform Check 3.
Check 3 System board may be faulty. Replace it with a new one following the instructions
in Chapter 4, Replacement Procedure.