Samsung 192T Service Manual page 11

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?
Is Pin 2 (BKLT_EN) of IC203 high?
Check IC301 and related circuit.
No
Does the input signal appear at Pin 116, 117, 115 and 118 of
IC301 (DHS,DVS,DEN,DCLK)?
Does the analog video signal appear at
R201, R202, R203? (RED, GREEN, BLUE)
Does the sync signal
appear at R225 and R224?
(A_H*V_SYNC, A_V_SYNC)
Does the video signal
appear at the output port?
4-2
5
8 7 6
Yes
No
4 3 2 1
No
Yes
10 11
Yes
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.
MO19P*/MO19E*