LG FLATRON E2040S - TROUBLESHOOTING: NO RASTER (LIPS); OSD DISPLAY FAILURE (LIPS BACKLIGHT); VOLTAGE AND SIGNAL VERIFICATION

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2. NO RASTER (OSD IS NOT DISPLAY)-LIPS
LIPS
YES
YES
YES
Check CN702
PIN 8 =5V?
NO
Check BL ON/OFF pulse as
contacting scope
No Raster
(OSD Is Not Displayed)
Check U701
PIN 2 =3.3V?
Check CN702
PIN 8 =5V?
Check power board and find out a
short point as penning each power
line
1. Check U701
2. Check C706,C707,C708,C709
NO
NO