Toshiba Satellite M20 Maintenance Manual page 64

2 Troubleshooting
Check 3 The FL may be faulty. Replace it with a new one and return to Procedure 3. If
there is still an error, perform Check 4.
Check 4 The FL inverter board may be faulty. Replace it with a new one and return to
Procedure 3. If there is still an error, perform Check 5.
Check 5 Make sure the LCD/FL cable has been firmly connected to the system board
and LCD module.
FL inverter board
If the cable is loose or off, reconnect it firmly and return to Procedure 3. If
there is still an error, perform Check 6.
Check 6 The LCD/FL inverter cable may be faulty. Replace it with a new one and
return to Procedure 3. If there is still an error, perform Check 7.
Check 7 The LCD module may be faulty. Replace it with a new one and return to
Procedure 3. If there is still an error, perform Check 8.
Check 8 The System board may be faulty. Replace it with a new one. If there is still an
error, perform Check 9.
Check 9 The CPU may be faulty. Replace it with a new one following the instructions
in Chapter 4.
Check 10 The memory may be defective. Replace the memory module with a new one
following the steps described in Chapter 4. If the problem persist, perform
Check 10.
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System board
LCD/FL cable
Satellite M20 Maintenance Manual
2.8 Display
CPU