Ps 4 No Signal. Than go down to change resolution and go to automatic. In some cases, the audio problem is caused by signal issues.
Now I bought myself a monitor here, but when I put in the HDMI and turn on my Pro, I get a "no signal " message. That's a problem with the console and not your TV, but worry not, there's a manual fix. It is working great in my other Samsung smart tv.
You can't really game or watch movies on your new toy if you can't even bring up the PlayStation menu on your TV screen.
If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace.
No doubt Sony will release a firmware update soon to fully rectify the problem. It is working great in my other Samsung smart tv. Premature diagnosis- initially i thought it was an issue with the HDMI port because it felt kinda loose, and its a pretty common problem so i replaced it with a new one.