Daewoo LM32L1 - 6 Main PCB Trouble Diagnosis; 6-1-1.Common Checking Process When No Signal of Noraster

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Does No signal
screen appear?
Is LVDS connection
Correctly connected?
Is the signal
input Jack properly?
Check start
Y Y
Y
Y
Y
Y
Y
N
N
Does input source
(AV device) work?
Is input selection
in the Correct mode?
N
N
Is waveform of CLK
in the Main PCB
Normal?
N
Is a weak
Discharge detected
in the screen?
N
Check the connection
of Jack
(LCD and AV device)
Check AV device
N
Check input mode
Check LVDS connection
Panel & JP502 of Main PCB
Replace Main PCB
and/or Sub PCB
Replace Main PCB
and/or Sub PCB
Check other PCBs
and connectors
1.Check AC connection
2.Check Power S/W ON
3.Check other PCBs
6. Main PCB Trouble Diagnosis
6-1.Main PCB Trouble Diagnosis
6-1-1.Common checking process when “No signal of No raster”
No signal : OSD is work but no images are displying
No raster : OSD as well as images in not working