Daewoo DLP-20D7 - Troubleshooting: No Picture in External Input

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Trouble Shooting
7-5. When “No picture” in External input mode.
Does OSD menu
Screen appear?
Check the main PCB
and sub - JACK PCB
Check start
Y
N
Y
Is this weak discharge
On the screen?
Confirm AC connection.
Confirm Power SW ON.
Check the power,
Inverter and panel
N
Go to 7 - 4
Y
Is the signal jack
Correctly connected?
Check the
Connection of Jack
N
Y
Does input source
operate?
Operate AV device
N
Y
Is input selection
In used mode?
Confirm input selection
N
Y