LG 22LS4D Service Manual page 17

4. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
(2) Procedure check
Does minute
discharge At Module?
Yes
Is the LVDC cable
normal?
Yes
Is the IC700(FLI8548)
Output normal?
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Is the VAVS on?
YES
No
Check the LCD Module
No
Reconnect the LVDS
cable in P800
No
Replace the VSC.
Is the Low/High output
voltage normal except for
stand-by 5V?
NO
- 17 -
Replace the Power
board
NO
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