Toshiba M40 User Manual
Page 55
2.7 Display
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
System board
CPU
LCD/FL cable
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.
EQUIUM M40/M45/Satellite M40/M45 Maintenance Manual 2-17