Samsung UN46B8000XFXZA Service Manual page 58

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 PD board(SMPS).
Diagnostics
4
5
7
IC1401
HDMI1,2,3,4
No video
Yes
Check the HDMI source and check
the connection of HDMI cable?
Yes
Does the signal appear at IC1401
pin2~12(HDMI1), pin14~24(HDMI2),
pin27~37(HDMI3), pin39~49(HDMI4)?
Yes
Dose the digital data appear at output
of IC1401 pin89~99(HDMI output)?
Yes
Does the digital data appear at pin
14~42 of CN1002?
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
CN1002
Input an HDMI signal.
No
Check the connected cable.
Change the HDMI cable, Chagne the
No
main PCB assembly.
No
Change the IC1401 or the main PCB
No
Change the IC601 or the main PCB
No
Please, contact Tech support
4. Troubleshooting
IC601
assembly
assembly
4-13