I've browsed some of the other threads, and simply put, I'm an ***** I know a bit about computers, but knowledge is limited and I have yet to ever mess with PSUs. I was fixing up my cousin's computer for him as it was riddled with viruses and the like. He told me when I took it that it wouldn't boot. Booted fine for me, and did so for a while. I saved his stuff and reformatted it. Well, right after I finished making his computer secure so I could insert the disk and rescan all the files for viruses, the computer wouldn't boot with the blinking amber light. Occasionally it would happen, but would later boot. Now, if I wait a minute, it will act as though booting, stop, and go back to blinking. I think a new PSU is in order and I'm paranoid about swapping in one of the ones I have lying around. So I'll give the model #s of the one it was running and of the ones I have lying around. I just need to know if it's fine to put in or not lol It's a Dell 4700 psu model #: ps-6311-1ds replacing with either allied al-a300atx aopen fsp250-60gtw I have quite a few more lying around. But chances are I'm retarded and should just stick one in haha I can give the actual specs if need be. They're all relatively close, but not exact. And the allied, with has the closest specs, has slightly higher ratings. I know basic electronics, and too much amperage and you'll fry something. Any help would be greatly appreciated.