Daewoo DT-4220NH Service Manual page 50

TROUBLE DIAGNOSIS
(2) When weak Discharge exists on screen but "OSD screen" can not be seen
<1> Definition of this symptom
- When the set is turned on, screen is BLACK but Weak Discharge (luminescence) exists.
- OSD does not show on screen and the set does not respond to remote controller or KEY panel
buttons.
<2> PCB CHECK PRIORITY
- MAIN PCB, SUS PCB
<3> Repairing Procedure
- Check LVDS cable (MAIN PCB to DIGITAL PCB) first and then other connectors connecting
MAIN PCB. If this does not fix the problem replace MAIN PCB.
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