Apologies if this has been covered elsewhere (in which case, do point me in the right direction), but . . .
My rig had been running fine for at least eighteen months. Then, yesterday, in a cool (17°C), dry room I reached behind the PC case to hit the power switch on the mains socket. In that position, I was nicely placed to hear a loud crack and see a big electrical-arc flash inside the PC case. I couldn't tell exactly from where in the case the spark had come, but it quickly became apparent that the PC would no longer boot, and the power LED on the motherboard itself was not lit.
I initially wrote the whole thing off as being fried, when I realised that the 5A fuse in the kettle lead had blown. Switch to another kettle lead (13A fuse this time) and everything now seems fine. Ran Memtest86+ for three hours (four passes) and it found zero errors. Boot up, and the disks are fine, graphics output seems fine.
So I want to know whether anyone else has seen this in their rig? And ask whether there are any electrical / electronic engineering types who can tell me whether the loud and bright arc was caused by the blown fuse, or was the cause of the fuse blowing. Also, how can the inside of a PC generate such a noise and bright light without anything seeming to be damaged? Could static electricity (caused by the cool air) explain the occurrence? Any other damage I should be checking for?
Oh, and what fuse should a PC kettle lead need? Seeing as the power supply is only 650W, I would have thought that 5A ought to cover it (650W/240V = 2.7A).
My rig had been running fine for at least eighteen months. Then, yesterday, in a cool (17°C), dry room I reached behind the PC case to hit the power switch on the mains socket. In that position, I was nicely placed to hear a loud crack and see a big electrical-arc flash inside the PC case. I couldn't tell exactly from where in the case the spark had come, but it quickly became apparent that the PC would no longer boot, and the power LED on the motherboard itself was not lit.
I initially wrote the whole thing off as being fried, when I realised that the 5A fuse in the kettle lead had blown. Switch to another kettle lead (13A fuse this time) and everything now seems fine. Ran Memtest86+ for three hours (four passes) and it found zero errors. Boot up, and the disks are fine, graphics output seems fine.
So I want to know whether anyone else has seen this in their rig? And ask whether there are any electrical / electronic engineering types who can tell me whether the loud and bright arc was caused by the blown fuse, or was the cause of the fuse blowing. Also, how can the inside of a PC generate such a noise and bright light without anything seeming to be damaged? Could static electricity (caused by the cool air) explain the occurrence? Any other damage I should be checking for?
Oh, and what fuse should a PC kettle lead need? Seeing as the power supply is only 650W, I would have thought that 5A ought to cover it (650W/240V = 2.7A).