I have the personal cutter & the expression and have not had that problem.
1) check your cord, I know it sounds silly but you might not have it in all the way to the machine or the wall
2) like PP said, plug it into another outlet to make sure it's not the outlet
3) call cricut, you can't actually take it back to the stores.
at 8:23 PM on Jan. 6, 2010