Samsung UN F7050AF Series - No Video (HDMI 1, 2, 3, 4 - Digital Signal)

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.•
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 CN602_H2
DATA •
Pin #7, #9, #4, #6, #1, #3 of
CN602_H2
HDMI2 Clk -
Pin #10, #12 of CN603_H3
DATA •
Pin #7, #9, #4, #6, #1, #3 of
CN603_H3
HDMI3 Clk -
Pin #10, #12 of CN604_H4
DATA •
Pin #7, #9, #4, #6, #1, #3 of
CN604_H4
HDMI4 Clk -
Pin #10, #12 of CN601_H1
DATA •
Pin #7, #9, #4, #6, #1, #3 of
CN601_H1
No
Check CN601~4.
Check HDMI cable.
Change the Main Ass’y.
or
Check IC1001(X12).
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(X12).
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.
4-7
4. Troubleshooting