Read LG 42LY99-ZC (CHASSIS:LD75C) Service Manual online
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4. In case of occur strange screen into specific mode
4-1. In case of does't display the OSD
(1) Symptom
1) LED is green.
2) The minute discharge continuously accomplished from module
2) The minute discharge continuously accomplished from module
(2) Check follow
Is the LVDS
cable normal?
Replace Power Board.
Is the LVDS cable connected?
Re-insert the Cable.
Yes
No
No
Replace the FIL8548 IC(IC700).
No
Yes
Is the VSC Board
normal?
Replace the VSC B/D .
Does the FIL8548 IC(IC700)
operate?
Yes
No
Yes
Is the
Ctrl Board of Module
normal?
Replace the Ctrl B/D.
No
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