4-2-2. No Video (3-HDMI_Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
Major
checkpoints
Check the HDMI source.•
Check the HDMI switch.•
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 ?
No
Check a set in the ‘Stand-by mode’.
Yes
Check the HDMI source and check the
connection of HDMI cable ?
No
Input the HDMI signal properly.
Yes
1
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
No
Check CN601~4.
Check HDMI cable.
Change the Main Ass’y.
Yes
2
Check the signal at Output of ‘HDMI
switch IC’ ?
HDMI RX_Clk : Pin#116~117 of IC601
RX_Data : Pin#110~115 of IC601
No
Check IC601(HDMI switch).
Change the Main Ass’y.
Yes
2
Check the LVDS signal at output of Main
Board ?
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
No
Check IC1001(X10+).
Change the Main Ass’y.
Yes
Check the LVDS cable?
Replace the T-CON, LCD panel?
No
Please, Contact Tech support.
Caution Make sure to disconnect the power before working on the IP board.
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