Procedure 3 Replacement Check - Toshiba PORTEGE S100 Maintenance Manual
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- User manual (259 pages) ,
- User manual (216 pages) ,
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2.8 Display Troubleshooting
Procedure 3
Replacement Check
Units related to display are a FL inverter board, Display module, System board, LCD/FL
cable and display ON/OFF sensor. Any of the components may be damaged. Disassemble the
computer following the steps described in Chapter 4, Replacement Procedures, then perform
the following checks:
(1) If the FL does not light, perform Check 1.
(2) If characters are displayed on the internal display but the display is not
normal, perform Check 2.
(3) If the FL lights even if the display cover is closed, perform Check 5.
Check 1
Open the display and check the display on/off sensor. If the sensor works
properly, display switch may be damaged. Replace the switch with a new one. If
there is still an error, go to Check 2.
Check 2
The LCD/FL cable may be damaged. Replace the cable with a new one. If there is
still an error, go to Check 3.
Check 3
The LCD module may be damaged. Replace it with a new one and repeat
Procedure 1. If there is still an error, go to Check 4.
Check 4
The FL inverter board may be damaged. Replace it with a new one and repeat
Procedure 1. If there is still an error, go to Check 5.
Check 5
The system board may be damaged. Replace the system board with a new one.
PORTEGE S100 Maintenance Manual (960-508)
2 Troubleshooting Procedures
2-39
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Troubleshooting
