unstable display using HDMI

[jorvey90]

Hi everyone. I have a problem with my 55" Tcl smart tv. when I will use to display it with Hdmi the display is unstable the screen will all black a bit and it's repeating every 15 seconds

 

[hang-the-9]

Do all the HDMI ports do that and all sources? Try another cable?

 

[jorvey90]

Do all the HDMI ports do that and all sources? Try another cable?

yes I've tried another cable and still the same and I also tried the 3 hdmi ports and the problem is still going