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4-2-2. No Video (HDMI 1, 2 - Digital Signal)
Symptom
•
Audio is normal but no picture is displayed on the screen.
•
Check the HDMI source.
Major
•
Check the HDMI switch.
checkpoints
•
This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
•
1
Diagnostics
•
2
Caution
Make sure to disconnect the power before working on the IP Board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the HDMI source and check the
connection of HDMI cable ?
Yes
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
DATA
-
Pin #7, #9, #4, #6, #1, #3 of
CN502
Yes
Check the LVDS clk signal at output of
Main Board. (TX)
TX2_CLK : ODD_TXCLK_DN/DP
TX4_CLK : EVEN_TXCLK_DN/DP
Yes
Check the LVDS cable?
Replace the T CON / LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the HDMI signal properly.
Check CN501_H2, CN502.
Check HDMI cable.
Change the Main Ass'y.
No
Check IC1001(X14H).
Change the Main Ass'y.
Check IC1001(X14H).
No
Change the Main Ass'y.
No
Please, Contact tech support.
4. Troubleshooting
or
4-5
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