4-2-3. No Video (HDMI 1, 2, 3, 4 - Digital 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 HDMI source. -
Check the HDMI switch, 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
Yes
No
No
Check a set in the ‘Stand-by mode’.
Please, Contact Tech support.
Input the HDMI signal properly.
Check the HDMI source and
check the connection of HDMI cable ?
No
Check CN601~4.
Check HDMI cable.
Change the Main Assy.
Check IC1401(HDMI switch).
Change the Main Assy.
Check IC1101(Valencia) and
IC1701(Reading).
Change the Main Assy.
No
No
No
Check the signal at Input of Main board ?
HDMI1 Clk : Pin #1,#2 of D614
DATA : Pin #3, #4 of D614
HDMI2 Clk : Pin #1,#2 of D611
DATA : Pin #3, #4 of D611
HDMI3 Clk : Pin #1,#2 of D613
DATA : Pin #3, #4 of D613
HDMI4 Clk : Pin #1,#2 of D604
DATA : Pin #3, #4 of D604
Check the signal at Output of ‘HDMI switch
IC’ ?
HDMI RX_Clk : Pin#62~63 of IC601
RX_Data : Pin#56~61 of IC601
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
6
6
5
Caution Make sure to disconnect the power before working on the IP board.
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