Previously when I have had PSU's fail, they have done so properly. The most recent being with a bang and a flash. However, one of my PC's has a Clio PSU of unknown origin in it, and has started to behave a bit strangly. When you press the power button, nothing happens... For a while... then the PC turns on normally. Sometimes it only waits a few seconds, sometimes it can be 10 minutes later before it starts up. I have moved the PSU to another computer, the odd behaviour has followed. The second computer has a power LED on the mobo which is on, even if the PC doesn't start. So I know the PSU's 5v stand by is working.
My question is, has anyone else ever seen a PSU behave like this? Is it worth opening the PSU to look for a bad connection somewhere or should I bin this PSU and get a http://www.scan.co.uk/Products/550w-Corsair-VX-Series-PSU-ATX-PS-2-5-year-Warranty-see-specsCorsair 550VX instead?
Oh, and just to rub it in, it looks like the hard disk in the PC that this PSU is now in has also died.