Toshiba QOSMIO E10 Maintenance Manual page 95

2 Troubleshooting Procedures
Procedure 4 Replacement Check
The FL, FL inverter board, LCD module, and system board LCD/FL cable are connected to
display circuits. Any of these components may be damaged. Refer to Chapter 4, Replacement
Procedures, for instructions on how to disassemble the computer and then perform the
following checks:
If the FL does not light, perform Check 1.
If characters or graphics on the internal display are not displayed clearly, perform
Check 4.
If some screen functions do not operate properly, perform Check 4.
If the FL remains lit when the display is closed, perform Check 5.
Check 1 Replace the FL with a new one following the instructions in Chapter 4,
Replacement Procedures and test the display again. If the problem still exists,
perform Check 2.
Check 2 The LCD/FL cable or HV cable may be defective or damaged. Replace the
FL/LCD or HV cable with a new one following the instructions in Chapter 4,
Replacement Procedure and test the display again. If the problem still exists,
perform Check 3.
Check 3 The FL inverter board may be defective or damaged. Replace the FL inverter board
with a new one following the instructions in Chapter 4, Replacement Procedure
and test the display again. If the problem still exists, perform Check 4.
Check 4 The LCD module may be defective or damaged. Replace the LCD module with a
new one following the instructions in Chapter 4, Replacement Procedure and test
the display again. If the problem still exists, perform Check 5.
Check 5 The system board may be defective or damaged. Replace it with a new one
following the instructions in Chapter 4, Replacement Procedure.
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2.8 Display Troubleshooting
QOSMIO E10 Maintenance Manual (960-492)