The problem is a blown FTDI chip caused by your power supply going to ground and putting 50% of your electricity voltage across the ground plane and into your computer. The power supply is bad and should not be plugged into your other jalapeno. It should be flagged and trashed.

The jally will either need to be RMAed or you will have to find someone who can replace the chip. I have done it once, it is a screaming pain for a medium level rework person like myself, but should be simpler for somoene who reworks X-Boxes and PS3's for a living.

Sorry to be the bearer of bad news, but this seems to happen in the EU. Long term solution is to get a locally sourced power supply that is of a quality to handle your type of power needs and providers.

C