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4-2-2. No Video (HDMI 1, 2, 3, 4 - Digital Signal)
Note
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.
•
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 CN801
•
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN801
HDMI2 Clk
-
Pin #10, #12 of CN701
•
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN701
HDMI3 Clk
-
Pin #10, #12 of CN700
•
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN700
HDMI4 Clk
-
Pin #10, #12 of CN800
•
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN800
Yes
Check the Vby1 signal at output of
Main board.(TX)
TX6_CLK : TCON SDA
-
TX8_DATA : TCON SCL
-
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 CN700,701,800,801
Check HDMI cable.
Change the Main Ass'y
No
Check IC1400(NT14U).
Change the Main Ass'y.
Check IC1400(NT14U).
No
Change the Main Ass'y.
No
Please, Contact tech support.
4. Troubleshooting
or
4-7
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