4-5
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the HDMI source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
2
3
1
No
Does the digital data appear at
Pin17,18,20,21,23,24 of IC3108?
Power Indicator is off.
Lamp on, no video.
No
Check the connection
of HDMI cable?
Check a IC3108.
Change a main PCB ass’y.
Check a IC5105.
Change a main PCB ass’y.
No
Does the digital data appear at output
of LVDS (RA5104~RA5109)?
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Yes
Yes
Input a HDMI cable.
Yes
Yes
2
3
1
Caution Make sure to disconnect the power before working on the IP board.
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