Just to chime in here for others’ future reference. Last night, the rotating brush piece of the Cordless vacuum stopped rotating for me, but the lights still came on. I did a lot of troubleshooting and found there was a TON of hair clogging up the inside of this piece (picture taken after I removed all the tangled/clogging hair). Worked fine after I did that.
Again, I pulled out the brush part and took off that cap and somehow there was a bunch of hair tangled around that little metal piece. I just pulled it off (it came out pretty easily), and everything worked as normal again (so if yours has a similar issue, consider checking and cleaning out that part, and your issue might resolve too 
).