5 Troubleshooting
5-1-2 No Video [Analog]
Check signal cable and connection.
Does the video signal appear
at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of
98765
IC302?
Yes
Yes
Is Pin 4 (BLIGHT_EN) of CN102 high?Check TFT-LCD panel and inverter.
No
Check IC402 and related circuit.
No
YesDoes the input signal appear at Pin 103, 105, 102 and 104 of
Replace IC402.
IC402 (DHS,DVS,DEN,DCLK)?4321
No
Does the analog video signal appear atNo
Check PC signal.
R107, R108, R109? (RED, GREEN, BLUE)
Yes
Does the sync signal
NoCheck R104, R103
and related circuit.appear at R104 and R103? (AHS, AVS)
1011
Check PC signal.
Yes
Does the video signalNo
Check IC402 and related circuit.
appear at the output port?
5-2GY15MS*/GY17MS* |