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T6600C, T6600C/CD, T6600C/CDV
Procedure 5
Replacement Check
The FL unit, FL inverter board, LCD module, and system board have display circuits. Any of
these components may be damaged. Refer to Chapter 4,
Replacement Procedures
, for instruc-
tions on how to disassemble the computer and then perform the following checks:
❑
If the FL unit does not light, perform Check 1.
❑
If characters are not displayed clearly, perform Check 3.
❑
If some screen functions do not operate properly, perform Check 3.
❑
If the FL remains lit when the display is closed, perform Check 4.
Check 1
Replace the FL unit with a new one and test the display again. If the problem still
exists, perform Check 2.
Check 2
Replace the FL inverter board with a new one and test the display again. If the
problem still exists, perform Check 3.
Check 3
Replace the LCD module with a new one and test the display again. If the
problem still exists, perform Check 4.
Check 4
Replace the display switch with a new one and test the display again. If the
problem still exists, perform Check 5.
Check 5
Replace the display cable with a new one and test the display again. If the
problem still exists, perform Check 6.
Check 6
The system board may be damaged. Replace the system board with a new one and
test the display again.