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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.
Check the HDMI source and check the
Check the signal at Input of Main Board ?
-
-
1
Diagnostics
-
-
Check the Vby1 signal at output of
2
-
-
Replace the T CON / LCD panel?
Caution
Make sure to disconnect the power before working on the IP Board.
All manuals and user guides at all-guidesbox.com
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
connection of HDMI cable ?
Yes
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
Main board.(TX)
TX6_CLK : TCON SDA
TX8_DATA : TCON SCL
Yes
Check the LVDS cable?
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
or
Check IC1400(NT14U).
Change the Main Ass'y.
Check IC1400(NT14U).
No
Change the Main Ass'y.
No
Please, Contact tech support.
4. Troubleshooting
4-7
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