Samsung GY15MS series Service Manual page 20

5 Troubleshooting
5-2-2 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
9
IC301?
Is Pin 4 (BLIGHT_EN) of CN302 high?
Check IC201 and related circuit.
No
Does the input signal appear at Pin 103, 105, 102 and 104 of
IC201 (DHS,DVS,DEN,DCLK)?
Does the analog video signal appear at
R118, R119, R120? (RED, GREEN, BLUE)
appear at R116 and R115? (AHS, AVS)
Does the video signal
appear at the output port?
5-4
8 7 6
Yes
No
4 3 2
No
Yes
Does the sync signal
10 11
Yes
5
Yes
Check TFT-LCD panel and inverter.
Yes
1
No
No
No
Check IC201 and related circuit.
Replace IC201.
Check PC signal.
Check R116, R115
and related circuit.
Check PC signal.
GY15MS*/GY17MS*