PC Not Booting Up After New PSU

[intzaki]

Sorry this text is not well written.

 

[Petarded]

does it boot up when you reconnect the old unit?

 

[intzaki]

does it boot up when you reconnect the old unit?

Yes it does. Perfectly fine. Except for the fact that now it doesn't detect the RAM which it detected before, but I am sure that's easy to solve (probably if I take the RAM out and put it back in). The new PSU should be better and more powerful than the PSU I had. So I don't know what the problem is...