My Kitchenaid mixer won't start.

My issues were that it 1st - only ran on one speed, then 2nd, wouldn't turn on. The problem (I think) ended up being two loose bolts in the back housing behind the switch controller. When I took off the back cover, they just fell out. I couldn't find any photos of what the assembly should have looked like, so it was trial and error testing. Once I put the loose bolts back on the “hidden” posts/screws on the far back metal plate and tightened them down (and undid all the other adjustments I tried to make first) it worked like a champ.