Yesterday I built 2 new PCs with pretty much the same specs; 2 times the same PSU , a corsair enthusiast tx550m.
Only difference was the case. When I put the first PSU in the first case, a CM690 II advanced, the PSU made a loud popping sound as if something exploded. I could also see a little spark and my fuse blew.
I thought it had broken so I took the second case , put in the second PSU in the other case and powered it up on a different electrical circuit and poof ! The exact same thing. I started to think this was normal, like the capacitors charging or something. I started fitting the rest of the parts and it started up, there haven't been any shocks or "explosions" any more in the first case. In the second case it happened one more time, on first boot. It wasn't anything like the first 2 pops though, it was more like a silent "pang" sound.
I don't know what these pops were, and hope you guys and girls can help me with this..
Thanks in advance.