why won't it turn back on? Kenmore Canister Vac 116.25915503?

re Kenmore Canister Vacuum Cleaner 116.25915503

the problem:

i was using vacuum and was moving around as normal, and had to use the hose to pull the machine closer to me. but i did it gently -- i didn't tug it very hard at all.

right then the hose popped out of the machine at the canister -- and the vacuum cleaner motor instantly stopped working. no big deal, right?

so i put the hose back in, and tried to turn it on again -- but nothing happened -- no lights, no noise, no motor starting up. and no indicator light showing a jam or anything.

[ please note that at the time, i had not run over anything, the motor sounded completely normal, and the carpet was not particularly dirty. nothing was caught or jammed in the belt, nor under the floorpiece. the setting was at the normal carpet setting that we always use, and so there was nothing unusual at all. ]

in fact the only thing that happened was that the hose came out, and the motor stopped. so i put the hose back in.

thinking it might need a reset, i looked at the machine parts, and saw the reset button on the floor attachment, where the rolling head /beater is.

so i pressed the reset button but nothing happened. the reset light was not even on.

my roommate and inspected the machine and saw nothing -- so we took apart the floor piece and see if there is anything obviously wrong, but there did not seem to be -- the belt is fine and was not jammed.

with the cover of the floorpiece off, i pressed the red reset button inside the floor piece/beater assembly, but again, nothing happened.

so we cannot figure out what the problem is. my hunch is that it would be some electrical catch -- some reason the current is not getting to, or is not being allowed to get to, the motor.

-- what could be the reasons for this, and where should i look?
-- could the machine just need a proper reset ?
-- what else could be preventing the machine from restarting? there was no apparent stress on the motor during use, and no weird sounds, so it seems unlikely that i fried the motor simply by the hose coming out.
-- could it be something simple like a fuse, and if so, why did the fuse suddenly blow when the hose simply came out -- what would the trigger event have been?

help! thanks in advance.