Connecting Xbox one to older HDMI tv's

Maybe search the tv model and xbox to see if others have issue connecting there tv to the console, I had to for an older tv which needed a new hdmi. It's possible the hdmi port on the tv or xbox could be slightly pushed in meaning it's not actually connected,
very unlikely but if it is you'll need to contact xbox support.

I did some trobleshooting and futher research on this subject. I have an older Denon receiver that does not accept HDMI, so I connected my XBOX One to my TV via an HDMI cable and then connected my TV to my receiver via an optical cable. Apparently LG TVs
like the one I have do not have the capability to take 5.1 surround sound input from HDMI and output it through the optical. So, I will have to wait until Microsoft provides Dolby Digital support through the optical out on the XBOX One.

Also would like to mention I have never had this problem with the older 360. The older 360 did however use the old hdmi connection (6 prongs) And i have several other things i usually switch out to the hdmi ports on the back of the tv, so i doubt its the
hdmi port on the back of the tv.

I have an older DirecTV HD DVR connected to my Xbox One also and all is working well now.

In order to get it to work, I had to connect the DVR, via HDMI, directly to the Xbox One's HDMI input. The DVR no longer passes through the AV receiver. The AV receiver's HDMI out is now connected to a different input on the TV. Fortunately, my AV receiver,
a Yamaha, turns off and on automatically with the TV, a Sharp, otherwise I don't think that everything would work, but I'm not sure. The optical out from the Xbox is the only connection to the AV receiver for the DirecTV and Xbox audio.

I don't know the details of how CEC over HDMI works, but if it is Ethernet based, you may not need a direct connection between two devices for the commands to reach the right device. For example, since my Xbox one is connected to the TV via HDMI and the
AV receiver is also connected to the TV the same way, the TV could be passing the commands along to all connected devices. If this is the case, you should be able to get your system to function fully as well.

Good luck!

Which Xbox One is it? The original or the new Xbox One S?

This link may be helpful to see as well.
support.xbox.com/.../tv-or-monitor-screen-is-blank-while-connected

Could you try the following?

• Try connecting your Xbox One to another TV is possible.
• Try using another HDMI to connect from the Xbox One to the TV. This may see if it's your console or the HDMI cord you're using is bad.
  
• Connect the HDMI to another port of your TV (HDMI 1, HDMI 2).