Chosen Solution

So I bought a power supply replacement from iFixit. Followed the steps to replace it and I’m still getting the same problem. If I send it back will they send me another one to see if it works? Thanks

I’m going to go out on a limb here and guess that your PS4 is turning on then right back off. If this is the case then it’s not the power supply that’s causing the problem. This problem is usually caused by a faulty APU or the solder joints between the APU and motherboard. Let me know if there is some other problem that you are trying to fix. I hope this helps.