Have you rung your consultant or H.O. lizzyg? Silly question but does it still work with one missing?
Hope you won't have to be without it for too long. How old is your machine? Goodluck!!
If it makes you feel any better lizzyg a member on the RC did the same,this is her replyhttp://www.recipecommunity.com.au/thermomix-recipe-community-forum-members/meeting-point/11200/mortified.html