LG FLATRON L226WTQ-BFQ.A MQF Series Service Manual page 17

NO RASTER
(OSD IS NOT DISPLAYED)
CHECK IC501
PIN2(3.3V)
PIN17(1.8V)
U501
1
PIN 108,109
14.3MHZ?
CHECK IC501
PIN89(H-SYNC) AND
PIN90(V-SYNC).
IS PULSE APPEARED AT
SIGNAL PINS?
TROUBLE IN CABLE
OR LCD MODULE
Waveforms
4
IC501-#108
3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN
YES
YES
YES
NO
NO
NO
- 17 -
CHECK IC601(1.8V),
IC602(3.3V)
1. CHECK PIN 108,109
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN IC501
CHECK CONNECTION LINE
FROM D-SUB TO IC501