4-1-3. No Video (HDMI - Digital Signal)
N Refer to the next page to check the location 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 Valencia -
This may happen when the LVDS cable connecting the Main Board and the Panel is -
disconnected.
Diagnostics
MAIN BOARD
SMPS BOARD
T-CON
Input the HDMI signal properly.
Check CN601~4.
Check HDMI cable.
Change the Main Assy.
Check IC601(HDMI switch).
Change the Main Assy.
Check IC1001(GenoaS) and
IC2001(Parma).
Change the Main Assy.
No
No
No
No
No
Yes
Yes
Yes
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the LVDS cable?
Replace the T-con / LCD panel?
Check a set in the ‘Stand-by mode’.
Please, Contact Tech support.
No
Yes
Check the HDMI source and check the
connection of HDMI cable ?
Check the signal at Input of
Main board ?
HDMI1 Clk : Pin #31,#32 of IC601
DATA : Pin #33~#38 of IC601
HDMI2 Clk : Pin #21,#22 of IC601
DATA : Pin #23~#28 of IC601
HDMI3 Clk : Pin #11,#12 of IC601
DATA : Pin #13~#18 of IC601
HDMI4 Clk : Pin #2,#3 of IC601
DATA : Pin #4~#9 of IC601
Check the signal at Output of
‘HDMI switch IC’ ?
HDMI RX_Clk : Pin#116~117 of IC601
RX_Data : Pin#110~115 of IC601
Check the LVDS clk signal at output of
Main board ? (TX)
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
1
2
2
Caution Make sure to disconnect the power before working on the IP board.
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