LG 42PX4DV Service Manual page 17

5. In the case of occur strange screen into specific mode
5-1. In case of does't display the OSD
(1) Symptom
LED is green
¯
The minute discharge continuously becomes
¯
accomplished from module
(2) Check following
Is the LVDS cable
normal?
Yes
Is the VSC Digital
Board normal?
Yes
Is the Ctrl Board of
Module normal?
No
Is the LVDS cable
connected correctly?
No
Connect the cable correctly.
No
Does the Thine IC
(IC1401)operates ?
No
Replace Thine
IC(IC1401).
No
Replace Ctrl B/D.
Yes
Replace the cable.
Yes
Does the IEP
(IC1301) operates?
No
Replace
IEP(IC1301).
- 17 -
Yes
Does the scaler
(IC701) Operates?
No
Replace
Scaler(IC701).
Yes
Replace the VSC
Digital B/D