LG 42PC1R Service Manual page 22

5. In case of occurring strange screen into specific mode
5-1. In case the OSD does not displayed
(1) Symptom
1) LED is white.
2) The minute discharged continuously becomes
accomplished from module.
(2) Check following
Is the LVDS cable
normal ?
Yes
Is the VSC Board
normal?
Yes
Is the Ctrl Board of
Module normal?
No
Is the LVDS cable
connected well?
No
Cable inserts well.
No
Does the FIL8662 IC
(IC800) Operates ?
No
Replace FIL8662
IC(IC800).
No
Replace Ctrl B/D.
Yes
Replace the cable.
Yes
Replace VSC B/D