Read LG 37LG50D (CHASSIS:LJ82A) Service Manual online
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RGB Video Trouble Shooting
Check sig nal fo rmat
Is it sup ported?
Check sig nal, Hsync, Vs ync
C729, C730, C731, R763, R764
Replace it.
Check sig nal
R703, R768, R772
Y
Y
N
Check P70 1
Replace connector
Y
N
Y
Replace it
N
Maybe BCM3553(IC100) has
proble ms
Check L 703 Voltag e Level 9V
Y
Replace L 703 / Q701 / Q703 /
Q704
N
Check Sig nal
C635, C636, C637
Y
Replace it
N
Check RGB C able
Y
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