LG RT-42LZ30, Service Manual

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3. NO RASTER ON VIDEO SIGNAL INPUT
NO RASTER ON VIDEO SIGNAL
CHECK CABLE OF
VIDEO/COMPONENT
CHECK THE PERIPHERAL
UPD64011(U904)
CHECK THE PERIPHERAL IC
OF UPD64011, MDIN150 SDRAM
CHECK THE PERIPHERAL IC
OF GM1501(U402)
CHECK UPD64011(U904)I/O
SIGNAL
CHECK MDIN150(U901) AND
SDRAM(U902) I/O SIGNAL
CHECK GM1501(U402)AND
SDRAM(U401)
POWER CHECK OF CXA2040(U201) : U204(9V)
POWER CHECK OF UPD64011(U904) : U905(3.3V), U906(1.5V)
POWER CHECK OF MDIN150(U901) : U907(3.3V), U908(2.5V)
POWER CHECK OF GM1501(U402)
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL