LG FLATRON E1940T - Page 20

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3. NO RASTER (OSD IS NOT DISPLAY)-MSTAR
1. Check C420 C421
2. Check X401
3. Trouble in Scaler IC
Scaler pin 127,
128 oscillates as
12MHz?
No Raster
(OSD Is Not Displayed)
Check connection line from
D-SUB to Scaler
Trouble in cable or LCD
module
NO
YES
YES
NO
Scaler IC
pin 41 H Sync ?
pin 42 V Sync?