Right, I built my PC about 2 years ago, and it's been working fine until today, when it just won't turn on. No lights on the motherboard, PSU, nothing. No fans start, no beeps, or anything. This is why I hope it is just the PSU, which is a 650W Silverpower brand. (Blue LED's) I went to check the fuse box and the switch which controls the upstairs plug sockets (where the pc is) had turned off, after turning it back on it still doesn't work. I've tried plugging the pc in downstairs but to no avail. After i turned the pc off last night I also turned it off at the plug, which I don't normally do, because I'm paying bills this year and was worried about and electricity it may be gobbling up. Could this be a reason? Maybe when I turned it back on it blew the fuse? Hopefully people can help me with this, I hope only the psu has gone and nothing else, I'm on a limited budget at the moment. The rest of the spec should be in my sig. Thanks.