My rotating brushes have stopped rotating

SOURCE: Less than 1 year old Bissell Healthy Home 15 in. 12 Amp

that machine is made to do that, there is a safety switch in the base of the machine that shuts the brush off when the handle is in the upright position.

SOURCE: Bissell Vacuum Cleaner

on some brush rollers you can take the ends off to clean out the debris i have a revolution myself.just pull on each end and see if you can get the ends off.

SOURCE: Brushes on My Hoover Steam cleaner will not spin

We had same problem,Had to have bearings replaced at hoover store/service center. If you bought it within the last year it is under warranty and you wont be charged.

SOURCE: Brush will not spin any longer

Even though the belt may look okay it can still be stretched. If the belt is stretched then it will not turn against the resistance of the carpet. I would try changing the belt. You can get the belt for this model here:

http://www.vacbelts.com/bissell-pet-hair-eraser-belt.htm

SOURCE: Took Roomba apart to clean and now the pick up

You can go to www.iRobot.com . This is the roomba website. You should be able to find replacement parts, customer support, videos or the Roomba product, and more.
When you cleaned your Roomba, did you also clean the wheel wells and outer most edges of the brush brush cartridges? There can be lint, threads, and at my house, cat hair, wrapped around the outermost edges of the brush cartridges.
I hope my suggestions help. If so, please contact Fixya and rate my solution.
Thanks and Good Luck!