Chosen Solution
The PS4 come on but it don’t show on t.v.
There are several things that could be happening here. You could have a bad HDMI cable but the most likely cause is that you have a bad HDMI port. This is a very common problem with PS4’s. The HDMI port that Sony installed has lots of weak points and they go bad easily. You’ll likely need an HDMI port repair. I hope this helps.
You will need to find a tv or monitor it works on then change the video settings to be compatible with the tv you would like to use, For example 480p,720p,1080p Good Luck