Samsung UA40B6000VR Service Manual page 28

4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the HDMI source
-
Major
Check the IC601(chelsea)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Caution Make sure to disconnect the power before working on the IP board.
Diagnostics
4
5
7
4-8
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
R683~R685(data), R683, R684
(clk+/-)?(HDMI1,2,3) or does the signal
appear at R693~R698 (data), R697,
R698(clk+/-)? HDM4
Yes
Dose the digital data appear at output
of R651, R652, R635, R636, R646,
R647 (R). R633, R634, R2, R655,
R656(G). R631, R632, R601, R602,
R653, R654(B)?(MST336)
Yes
Does the digital data appear at pin
10~42 of CN2002?
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Input an HDMI signal.
No
Check the connected cable.
heck JA301, JA303, JA305(HDMI1,2,3)
side HDMI assy or JA401(HDMI4).
No
Change the HDMI cable, Chagne the
main PCB assembly.
No
Change the main PCB assembly
No
Check IC2000
Change the main PCB assembly
No
Please, contact Tech support
Check IC500