Lost HDMI signal when connected to my StarHub tv box

Hi,

I experienced the same issue. What I did to resolve it was :

I unplug the HDMI cable and rebotted my cable box. I replugged the HDMI cable and it worked perfectly !

After one day of having the xbox one hooked up to get the cable box hdmi signal from my Yamaha RX-V665 receiver, the cable box seemed to be overheating (presumably from Xbox pulling video constantly / polling the tv guide). The issues seen are the xbox displays
"We lost your TV signal, make sure your cable or satellite box is on and plugged in to the xbox" randomly while watching TV, at which time the display on the cable box shows "DUI (download user interface) as if it has just been restarted. Tested using through
receiver and directly connected to cable box with the same results, TV freezes and signal is lost often within moments randomly. Immediately after having the issue I can hook the cable box up directly to the TV at which time the TV signal works flawlessly.
Therefore the issue has to do with how the xbox one is utilizing the HDMI signal to and from the cable box. The cable box has never exhibited these issues before and doesn't have them when not connected to the xbox.

I just started having this same issue. It had been working properly for one year. But suddenly the TV signal from my Comcast cable box began to cut in and out, and eventually just displays a blue screen (though someitmes it flashes to "Your TV signal
was lost" then flashes back to blue).

At first I thought it was my cable box, so I replaced that. Then I replaced the HDMI cable.

Everything else on the XBOX works fine. And if I connect my cable box direct to my TV, it works fine. So it must be with the XBOX One itself.

...and my warranty expired. Great.

Thaaats embarrasing, i didn't even think of doing that! But yeah I changed the language to norwegian, and my region to Norway. I was now able to put in my ZIP code and i could also see all my channels but when i attempt to actually watch TV it just says
"we lost the TV-signal, please make sure that everything is connected the right way" and yes, my apple TV is connected to the HDMI in port but that should not make a difference since my TV has its cable box integrated in it.

I am facing "lost TV signal" message after July update. The signal comes back after around 2 min. This issue is really frustrating as it was working perfectly fine before the update and never faced any issues not even once. I tried selecting tv connection
as "hdmi" and the resolution of the TV and cable box are the same at 720p but still nothing changed.

I have a humax receiver and use it as a satellite only as one guide in not available in my county.