Procedure 4 Replacement Check - Toshiba Satellite L640 Maintenance Manual

Chapter 2 Troubleshooting Procedures
Procedure 4 Replacement Check
LCD module, LCD cable are connected to display circuits. Any of these components may b
faulty. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble
the computer and then perf
If characters or graphics on the internal display are not displayed clearly, perf
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.
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)
orm the following checks:
e
orm