Dead PSU now working (sort of)

[Dark Light]

A week ago my PSU died, a AX850, I created a thread about it here. Today I tested it again before sending off the RMA request, it still didn't work. I tried a few things, then replaced all the cables and removed the jump, still nothing. However, it seems that after a while of the PSU being left plugged in it will work again, well until I unplug it then it will not work when I plug it back in.

Firstly is it safe the turn the PC on when the PSU seems to be working and secondly would this still constitute as faulty to Corsair?

 

[Dark Light]

Your psu is not yet dead its DYING and you will do as Dark Light stated do damage to other components in your pc.

I know, I guess I knew that all a long but I was hopping someone would say something that would convince me that it was ok, even though I knew it wasn't. But I've resisted the temptation to turn it on and the components should be safe. I've managed to borrow a silver rated 850W PSU that is 5 years old, I imagine that should be ok for a few months.