Samsung LA32B650T1R Service Manual page 62

4. Troubleshooting
4-1-3. No Video (HDMI 1, 2, 3, 4 - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the HDMI source.
-
Major
Check the HDMI switch, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
3
Diagnostics
3
2
Caution Make sure to disconnect the power before working on the IP board.
4-10
Power Indicator is off.
Lamp(Backlight) Off, no video?
Yes
Check the HDMI source and check
the connection of HDMI cable?
Yes
Does the signal appear at
D1423H (Pin#10 , #6 )(HDMI1)
D1425H (Pin#10 , #6 )(HDMI2)
D1427H (Pin#10 , #6 )(HDMI3)
D1421H (Pin#10 , #6 )(HDMI4)
(HDMI RX_Clk , RX_Data)?
Yes
Does the digital data appear at
F1401(Pin #1), F1402(pin #4)
(HDMI RX_Clk, RX_Data)?
Yes
Does the digital data appear at
R1030F (FRC_M_HSYNC)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the HDMI signal properly
Check CN1401~4
No
Check HDMI cable
Change the Main Assy
No
Check IC1401 (HDMI switch)
Change the Main Assy
Check IC601 (Chelsea)
No
Change the Main Assy
No
Please, Contact Tech support
Check a set