Sharp LC-39LE440U Service Manual page 45

Does not the picture display when VGA cable plugged into D-SUB ?
Is Video format correct?
YES
Terminal
Is R/G/B/H/V signal sent to pin (1)/RED,
(2)/Green, (3)/BLUE, (14)/H sync#,
YES
Main UNIT:
Is R/G/B/H/V signal sent to pin
(32)/RED, (30)/Green, (28)/BLUE,
YES
Refer to "The picture doesn't appear in
<External input D-SUB>No picture on the display (8)
Set the timing which TV is support
NO
Check the setting of an external input
NO
device that connects of CN1101
NO
Check the line between IC U2102 and
44