PS4 started to turn on and quickly turn off. Wasn't bad at first. I would unplug the cord, wait 30 seconds and try again and that usually worked. Then it started to get worse by doing the same thing for 2-4 days,. I knew it was the PSU by reading some forums and it would of cost me twice as much to send it in as to get it repaired.
Easy repair, but need special bits to get the panel off and the PSU out.
The left side of the PSU is harder to get out, but just lift the right side till the left gets lose a little