Problems with HDMI: TV -> xbox 360

^^^^Like Ice Storm said please plug in the HDMI cable into a different HDMI slot on your tv and change the input and see if that works. This will rule out that the HDMI slot has become faulty on your TV. Or you can also try to plug something different in
the same HDMI slot on your TV and you will get the same check to see if it is your TV's HDMI slot. If that doesn't fix the problem and your TV's HDMI slot is fine then it most likely is that the HDMI slot in the XBOX has become faulty. Try plugging the Xbox
into a different HDMI slot on a different TV and see if that fixes the problem. If that does not that will be proof positive that the HDMI slot in your 360 has become faulty and it is time to set up a repair

Hi, just to get a clearer view of your problem, your son has a tv with 2 hdmi inputs and you connect the cable box into hdmi in of Xbox one, cause one and 360 are using the 2 tv ports. And the tv app with the cable box works fine - the only problem is OneGuide
and control of tv trough Kinect doesn't work?

Greetings

Alright, well there are three likely reasons this could happen. Let's check for them, and see if we can fix your problem. Here are the possible problems:

1. The problem is with your HDMI cable. The end(s) may be bent out of shape, which could prevent it from working correctly. Try using a different HDMI cable with your xbox and TV -- if this fixes your problem, then you had a broken HDMI cable.
   
2. The problem is with your TV's HDMI port. To check for this, hook something else up to the HDMI port in your TV. In other words, connect a DVD player, Blu-ray player, or anything else with HDMI output to your TV and see if it works. If other devices work,
   then you know your problem is not with your TV.
3. The problem is with your Xbox 360's HDMI port. If you've tried the other two tests above, but your HDMI cable and TV's port work just fine, your Xbox 360 may have a damaged HDMI port. If this is the case, you should contact xbox support via chat or phone,
   because they can repair your Xbox for you. You can contact them from this page:
   support.xbox.com/.../contact-us

The good news is, your xbox is working just fine, apart from the hdmi display, since you can use component to play mostly normally. I hope this helps! Good luck getting your HDMI back on track.

NEVER had a problem with my 360 or xbone with my HDMI. How old is your TV and what HDMI cable are you using

your completely wrong JUAN VAN

check this external link

levelingdown.com/.../how-to-fix-the-360-to-tv-no-signal-problem-with-hdmi

try and share some actual knowledge next time