4-2-2. No Video (HDMI 1, 2 - 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 #10, #12 of CN501_H2
DATA -
Pin #7, #9, #4, #6, #1, #3 of
CN501_H2
HDMI2 Clk •
Pin #10, #12 of CN502_H3
DATA -
Pin #7, #9, #4, #6, #1, #3 of
CN502_H3
No
Check CN501~2.
Check HDMI cable.
Change the Main Ass’y.
or
Check IC1001(X14H).
Change the Main Ass’y.
Yes
2
Check the LVDS clk signal at output of
Main Board. (TX)
TX2_CLK : ODD_TXCLK_DN/DP
TX4_CLK : EVEN_TXCLK_DN/DP
No
Check IC1001(X14H).
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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