BLOD - Turns On If Not Switched On For Long Time

My PS4 is suffering from the blue light of death. It will turn on and immediately turn back of. It beeps, clicks, turns on, let’s out a high pitched beep, then clicks and turns back off.

The weird thing is. If I leave it sitting for a few days unplugged, it will turn on. However it wants to do an update and when it goes to restart it does the blue light of death again.

I’ve tried the washer trick and cleaning the internal and replacing thermal paste. I’ve tried replacing the Hard Drive and reinstalling the software, however that hasn’t provided any proper results. Does anyone know of there’s an alternative problem here?

Thanks guys!