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Symptom
Check Points
LCD Turn Black
1. Inverter Cable
2.Inverter to LCD
cable
3. A/D board to LCD
cable
4. Inverter Board
5. A/D Board
Touch
1. Driver (NA)
malfunction
2. Touch to. MB
cable
3. Touch controller
4. Touch panel
16
Detail Steps
1. Shut Down Power,
2. Open rear cover, open EMI chassis, check if
inverter cable well connected between A/D board
and inverter board
3. If yes, replace with another inverter cable for
testing
4. If fail, check if LCD cable well connected with
inverter board.
5. If yes, replace with another LCD cable for
testing.
6. If fail, check if LCD signal cable well connected
on A/D board.
7. If yes, replace with another LCD signal cable
for testing
8. If fail, replace with another inverter board for
testing
9. If fail, replace with another A/D board for
testing
10. If fail, System RMA to your dealer
1. Reinstall touch driver
2. If fail, shut down power
3. Open rear cover, remove inverter cable on A/D
board
4. Check if touch panel cable well connected with
touch controller
5. If yes to item 4, replace with another touch
controller for testing
6. If fail, replace with another touch panel for
testing
7. If fail, RMA system to your dealer
Chapter 5
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