New PSU, the issue persist

Hi !

So i bought a new psu 300cr for my PS4 PRO, change it and it worked just fine for like and hour, then i went to sleep. Morning after, it turn on just fine but when loading a game the console shut itself off. When trying to turning on, same issue than with the old PSU, one second bue light and then dead again.

Anyone has any idea what can be ?

I open again the console and clean everysingle corner of it, from the body to fan and radiator. Also changed the thermal paste, the pads i left the same ones.

I think it might be the conector from the PSU to the motherboard, ill buy one today just to be sure.

My other questions is, in the case that was a faulty conector or any other reason, will the new PSU be ok or i have to get a new PSU ?

Thanks !