Gateway FPD1520 Service Manual page 16

3. NO RASTER (OSD IS NOT DISPLAYED) – gmZAN2
NO RASTER
(OSD IS NOT DISPLAYED)
U201
POWER PINS
3.3V?
U201 PIN141, 142
OSCILLATE AS 14.3M?
J701
PIN2 IS 65MHz CLOCK?
PIN4 IS 48KHz H-SYNC?
PIN5 IS 60Hz V-SYNC?
PIN37 IS 48KHz DEN?
IS PULSE APPEARED
AT SIGNAL PINS?
YES
(LG Philips Module)
J701 PIN41
3.3V?
YES
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
YES (Hydis Module)
NO
NO
NO
J702 PIN1
3.3V?
YES
TROUBLE IN CABLE
OR LCD MODULE
NO
CHECK U802, U806
1. CHECK PIN141, 142
SOLDERING CONDITION
2. CHECK X201
3. TROUBLE IN U201
CHECK CONNECTION LINE
FROM U201 TO J701
NO
CHECK U805
CHECK U805