The Scottish Boinc Team

That's my little 7 GH/s Jalapeno dead. Power brick blew up with enough force to split the casing. Replacement brick employed but the miner is no longer recognised. Seems a common fault with the jalapenos that when the brick blows it takes out a chip on the board and no more communication.
Once again the BFL PSU's have proven to be trash. If you own a BFL miner, change the PSU for something not BFL original.

wow! I've only ever seen power supplies blow up when they are seriously overloaded or suffered a major power spike.

Reading on the net they seem to fail with disturbing regularity. Also disturbingly the PSU's are made to american standards with only 2 wires and no earth, hence when they fail in europe at 240 volts they ground through the USB cable and hence cause the FT232 usb chip to get fried in the unit.

quoted from one post https://bitcointalk.org/index.php?topic=365800.0
Indeed. The problem isn't faulting, shit happens. The problem is the impact; does the device fail safe or fail destructive.

Fail safe would be if a fault shorts to a ground at the PSU, blowing a fuse (in the PSU) or a main breaker. If you have a grounded device and your wiring meets NEC (or whatever you use in your country that is not corrupt) your PSU dies and you get another one.

Fail destructive would be if a fault shorts, there is no ground, and the case goes hot (deadly), an exposed connector goes hot (painful), or the fault goes to ground through another device (destructive). In the US, BFL supplies can't fail deadly. Those same power supplies on a 240 volt hot hot ground system would fail destructive.

so again, if you have a jalapeno with a genuine PSU then change the power brick for one intended fo EU use, like the lcd tv units used for the rockminer 32 GH/s miners.