Power loss to keyboard and screen Flickering.

Hey all,

I built this machine around 4 years ago and am currently considering building a new one, however I have loads of uni coursework due on the 30th October and 2nd of November so this is a rather hot issue till new parts arrive for a new machine.

The keyboard (which I have replaced twice) Is randomly losing power from the USB ports. Additionally my screen now seems to be refreshing at an alarming frequency.

I have fixed pcs for a long time and never really came across such an issue. Guess there is some gaps in my knowledge lol.

The conclusions I have drawn after all the usual test is the PSU is on it's way out, however I was hoping for some helpful suggestions encase I am missing the boat.

Running windows 7, memory tests came back clean, Q6600 process, 4GB Ram and Gigabyte something or other board lol.

It might be good to note I replaced the mobo 8 months ago due to my other mobo going faulty.

Thanx all    

Also any suggestions for a new processor