Topic: Playstation 4 Pro Ramping up & Shutting down on game start?

So I have a PS4 Pro, Just before Christmas it started shutting down soon as I went to launch any game.
It has been to a tech guy who replaced the Thermal paste & cleaned internally any dust. But the problem is still there.

I am able to turn the PS4 on and navigate the main menus and general stuff. Soon as I select a game to play, it will start to load, the fan ramps right up loud and then t it all shuts off. I have had it to a guy who does the basic stuff to PS4's like replacing the thermal paste and internal cleaning. He can see no visible damage or anything to the mainboard. i.e the capacitors or pots as he called them. All of the connectors are solid, as I said it all turns on and runs but shuts down on any game launch. All software and system is up to date with all updates.
The system itself has been on a Tv unit not in direct sunlight, it has always had good ventilation and never dropped or abused. I am at a total loss to what this could be, so any help and advice would be greatly received.

What I am asking is:
Has this happened to anyone else?
What was the fix?
How much would this cost?

My ps4 pro was a piece of garbage that got laggier as the years went by and frequently crashed from multi-tasking through the UI with a game running in the background . sometimes it would even crash without a game running . it would also crash shutting off but , my problem wasn’t like yours ; i could at least still play games on it - digitally . i never really used the disc drive , are your games digital ?

as far as how i fixed it , i traded it in to some poor sucker who still wants a ps4 out there . and how much it would cost to fix , i have no idea .

in the meantime , maybe try sitting the ps4 pro upright and , see if that makes a difference ? also maybe re-install your games and/or factory reset the system ..