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. -
Major
checkpoints
Check the PC source -
Check the Arsenal, Check the Valencia. -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the LVDS cable?
Replace the T-con / LCD panel?
Yes
Yes
Yes
Yes
No
No
Check a set in the ‘Stand-by mode’
or ‘DPMS mode’.
Please, Contact Tech support.
Input the analog PC signal properly.
Check the PC source and
check the connection of D-SUB ?
No
Check CN401, PC cable.
Change the Main Assy.
Check IC1101(Valencia) and
IC1701(Reading).
Change the Main Assy.
No
No
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
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
4
5
Caution Make sure to disconnect the power before working on the IP board.
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