LG FLATRON L4200A Service Manual page 26

5. NO RASTER STATE ON ANALOG SIGNAL
POWER CHECK OF BA7657(U103) : L105(5V)
POWER CHECK OF GM1501(U401)
POWER CHECK OF LVDS OUTPUT: J403
CONNECTOR(J101) CHECK
CHECK I/O SYNC OF BA7657(U103)
CHECK ADC I/O SIGNAL IN
GN1501(U402)
CHECK GM1501(U402) I/O SIGNAL
CHECK LVDS I/O SIGNAL
NO RASTER ON ANALOG SIGNAL
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL
NO OUTPUT SIGNAL
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CHECK THE PERIPHERAL IC
OF D-SUB(J101)
CHECK THE PERIPHERAL IC
OF GM1501(U402)
CHECK THE PERIPHERAL IC
OF GM1501(U402)
CHECK THE PERIPHERAL IC
OF GM1501(U402)