Samsung LA32B650T1R, Service Manual

Page: 62 / 99

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