No Video (Hdmi 1, 2 - Digital Signal) - Samsung HG40ED590BB Service Manual

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.
Check the HDMI source and check the
Check the signal at Input of Main Board ?
• HDMI1 Clk
Pin #10, #12 of CN501_H2
-
1
Diagnostics
• HDMI2 Clk
Pin #10, #12 of CN502_H3
-
Check the LVDS clk signal at output of
2
TX2_CLK : ODD_TXCLK_DN/DP
TX4_CLK : EVEN_TXCLK_DN/DP
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
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN501_H2
DATA
Pin #7, #9, #4, #6, #1, #3 of
CN502_H3
Yes
Main Board. (TX)
Yes
Check the LVDS cable?
No Check a set in the 'Stand-by mode'.
No Input the HDMI signal properly.
Check CN501~2.
Check HDMI cable.
Change the Main Ass'y.
No
or
Check IC1001(X14H).
Change the Main Ass'y.
Check IC1001(X14H).
No
Change the Main Ass'y.
No Please, Contact tech support.
4. Troubleshooting
4-5