Read LG 42LT75 / 42LT76 (CHASSIS:LD74A) Service Manual online
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3. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green
2) It maintains the condition where the front LED is green
(2) Check follow
Does minute
discharge
At Module?
Is The voltage
(P900 5pin on VSC)
0V or Low?
Is output the normality
Low/High voltage except
stand-by 5V?
Is the inverter on?
Check the LCD
Module
Replace VSC board.
Is It ok?
Yes
No
Yes
Yes
Replace the
Power board.
Yes
No
No
Is the LVDS
cable normal?
Reconnect the LVDS
cable in P1901.
Yes
No
Is the IC700 (FLI8548)
Output normal?
Replace the VSC
No
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