I bought an Xbox One X and after 3 days it says No Signal

You should return it where you bought it so they can give you a new one. Normally, there should be a 15 to 30 days warranty in store before thinking of sending it to Microsoft.

I'd take it back and exchange it. You shouldn't be having problems like that.

Without a doubt first where I buy it. There they must give the change for a new one. Look not to delay making the change

Just bought my xbox one s about a month ago, was working fine untill about 3 or 4 days ago. first, i would be playing the game then all of a sudden the entire system would shut off in the middle of online gameplay. then i was playing one night turned
the game off and went to sleep, the following day after coming home from work i tried to play the game but has no signal on tv,the system turns on but it shows no signal on tv. ive bought a brand new hdmi cord to see if that would fix it but still nothing...
can anyone help with my problem???

If nothing seems to work use the warrenty

Both of my xbox one x say no signal and it being the hdmi ports both times.