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Troubleshooting Procedures
Satellite U840
Maintenance Manual (960-Q08)
30
Procedure 4
Replacement Check
LCD module and 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 f LED backlight does not light, perform Check 1.
If characters or graphics on the internal display are not displayed clearly, perform
Check 2.
If some screen functions do not operate properly, perform Check 3.
Check 1
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.
Содержание Satellite U840 Series
Страница 1: ...Satellite U840 Maintenance Manual 960 Q08 Chapter 1 Hardware Overview ...
Страница 18: ...Chapter 1 Hardware Overview Satellite U840 Maintenance Manual 960 Q08 15 ...
Страница 24: ...2 1 Satellite U840 Maintenance Manual 960 Q08 Chapter 2 Troubleshooting Procedures ...
Страница 63: ...Test Program for Field Satellite U840 Tests and Diagnostics Manual 1 Chapter 3 Diagnostic Programs ...
Страница 190: ...Satellite U840 Maintenance Manual 960 Q08 Appendix B Appendix B Board Layout B 1 System Board ...
Страница 191: ...Board Layout Satellite U840 Maintenance Manual 960 Q08 Figure B 1 System board layout Front 02 01 03 04 05 06 07 08 09 ...