Samsung 172T Service Manual page 37

4 Troubleshooting
4-2-1 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
IC401?
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 analog video signal appear at
R201, R202, R203? (RED, GREEN, BLUE)
Yes
Does the sync signal
appear at R225 and R224?
(A_H*V_SYNC, A_V_SYNC)
Yes
Does the video signal
appear at the output port?
4-2
5
8 7 6
4 3 2 1
10 11
CONFIDENTIAL
Yes
Check TFT-LCD panel and Inverter.
Yes
Replace IC301.
No
Check PC Signal.
Check R225, R224
No
and related circuit.
Check PC Signal.
No
Check IC301 and related circuit.
MO17P*/MO17E*