LG Flatron M3200C Service Manual page 17

4. NO RASTER STATE ON RGB SIGNAL
REMARK : POWER CHECK
POWER CHECK OF BA7657F (U121) : 5VP
POWER CHECK OF SCHMITT TRIGGER (U123, U124) : 5VP
POWER CHECK OF MC14066B (U122) : 5VP
POWER CHECK OF GM1501H (U402)
INPUT WAFER CHECK (J101)
YES
CHECK
BA7657F(U121) I/O
SIGNAL?
NO PROBLEM
CHECK
BA7657F(U121) I/O
SYNC?
NO PROBLEM
CHECK
gm1501H(U402) I/O
SIGNAL?
NO PROBLEM
CHECK THE MODULE
CHECK THE INVERTER
NO RASTER STATE ON RGB SIGNAL
NO IN / OUTPUT SIGNAL
NO IN / OUTPUT SIGNAL
NO IN / OUTPUT SIGNAL
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CHECK THE PERIPHERAL
BA7657F(U121)
CHECK THE PERIPHERAL
SCHMITT TRIGGER (U123,U124)
CHECK THE PERIPHERAL
gm1501H(U402)
AND SDRAM(U401)