LG Flatron W1941S - Troubleshooting: No Raster


- 19 -
2. NO RASTER (OSD IS NOT DISPLAY)-LIPS
LIPS
No Raster
(OSD Is Not Displayed)
Check U701
PIN 2 =3.3V?
Check U701
PIN 3 =5V?
Check power board and find out a
short point as penning each power
line
1. Check U701
2. Check C706,C707
Check C704 (+)
1.8V?
1. Check Q702,Q703
2. CheckC704,C705
3. TROUBLE IN SCALER IC

NO
NO
NO
YES
YES
YES
Check CN701
PIN 3 =5V?
YES
NO
Check BL ON/OFF pulse as
contacting scope
http://www.wjel.net