LG FLATRON L1520BM-AL*R - Page 16

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1. CHECK PIN122, 123
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U201
U201
POWER PIN8, 114
3.3V?
NO
CHECK U801
U201
PIN122, 123
OSCILLATE AS
12MHZ?
CHECK CONNECTION LINE
FROM D-SUB TO U501
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – MST9011B
NO RASTER
(OSD IS NOT DISPLAYED)
U501
PIN43 IS 48KHz H-SYNC?
PIN44 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
AT MODE 12?
NO
NO