No Video [Digital - Samsung 172T Service Manual

4 Troubleshooting

4-2-2 No Video [Digital]

Check signal cable and connection.
Does the video signal appear
at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37of
IC401?
9
Yes
Is Pin 2(BKLT_EN) of IC203 High?
No
Check IC301 and related circuit.
No
Does the input signal appear at Pin 116, 117, 115 and 119 of
IC301 (DHS,DVS,DEN,DCLK)?
No
Does the signals appear at R216, R217,
13
R214,R215 R212, R213, R210, and R211?
Yes
Does the video signal appear at the output port?
MO17P*/MO17E*
8 7 6 5
4 3 2
12
14 15
Yes
Check TFT-LCD panel and Inverter.
Yes
Replace IC301.
1
No
Check PC Signal.
No
Check IC301 and related circuit.
CONFIDENTIAL
4-3