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13. TROUBLESHOOTING
A. NO BACKLIGHT PROBLEM
Problem: If TV is working, led is normal and there is no picture and backlight on the panel.
Possible couses: Backlight pin, dimming pin, backlight supply, stby on/off pin
BACKLIGHT_ON/OFF pin should be high when the backlight is ON. R23 must be low when the
backlight is OFF. If it is a problem, please check Q35 and the panel cables. Also it can be tested in TP310 in
main board.
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