If you blew a fuse you have a short somewhere. Replace the fuse with the power plug disconnected from the Livescope and see if it blows again .... it will blow again if there is a bare spot on a wire causing the short.

If the fuse doesn't blow, reconnect the Livescope. If it blows now there is either a short that gets disturbed when plugging in the unit or the unit is causing the short.