Right this is a weird one for me. I woke up this morning and the power was off. The electrics in our house are awful and the fuse goes every couple of days and shuts all the power off. So PC gets forced offline quite often. My main PC was on last night during the power shut down and it won't restart this morning. No life at all except the light on the ethernet port which i assume provides its own power. I swapped power cable to see if it was that, used a different wall plug etc. Then I removed the PSU and plugged it into my second PC which has been sitting disconnected in the cupboard for the last month and it powers up for 1 second and then restarts with a single click and continues like this. The weird thing is, I then tried it with the second PC's original PSU which hasnt been turned on in a month, and it is doing the exact same thing. Turning on for a second and then restarting with a click. What might this issue be? Have I just blown my second PC motherboard by plugging a faulty PSU into it? I was wondering if it was a safety issue with the PSUs shutting down due to the crappy electricity supply coming into the wall sockets? Any clues? Much appreciated.