Hooking up the memory and ign sense together should not cause any problems. If you just pull the unit out without shutting down does it remember the correct position? Does it still operate correctly in the car? If not there could be a possibility of some hardware fault, and you should contact empeg. I'm not sure why your memory fuse would be blown, I would assume that it happend while you were hooking something up. If I remember correctly, if you only hook up ign sense the unit should still work and just act like the MkI.

Brian

-See my empeg here-