LG 22LU7000 Service Manual page 20

3. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is blue
(2)
Check follow
Does minute discharge
At Module?
Yes
Is the LVDS
cable normal?
Yes
Is the U112(FLI10610H)
Output normal?
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No
Is the inverter on?
Check the LCD
Module
No
Reconnect the LVDS cable in JP451
No
Replace Main Board.
- 20 -
No
Yes
Is output the normality
Low/High voltage ?
Yes
Replace Main Board.
LGE Internal Use Only