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4. Troubleshooting
4-2-2. No Video (Analog PC signal)
※ Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the PC source
-
Major
Check the Arsenal, Check the Valencia.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
4
5
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
4-10
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the PC source and
check the connection of D-SUB ?
Yes
Check the signal appear at input of IC901 ?
PC_RED : C1042
PC_GREEN : C1043
PC_BLUE : C1044
PC_H_SYNK : C404
PC_V_SYNK : C405
Yes
Check the LVDS clk signal at output of
Main board.(TX1~TX4)
TX1_CLK : TP1978 ~1979
TX2_CLK : TP1980 ~1981
TX3_CLK : TP19102 ~19103
TX4_CLK : TP19104 ~19105
Yes
Check the LVDS cable?
Replace the T-con / LCD panel?
No
Check a set in the 'Stand-by mode'
or 'DPMS mode'.
No
Input the analog PC signal properly.
No
Check CN401, PC cable.
Change the Main Assy.
Check IC1101(Valencia) and
No
IC1701(Reading).
Change the Main Assy.
No
Please, Contact Tech support.

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