Vac won't turn on and the beater bar won't turn.

wrong belt or some dont tighten untill you drop handle

Do you mean the beater bar stops turning and then it doesn't vacuum?
Or it shuts off when you jam it full of carpet? Read the below manual:
http://www.sebo.us/pdfs/website_owners_manualsPDFs/AIRBELT%20K%20Manual.pdf

1. Get a long screw driver (probably phillips head) a strip of tape.
2. Look around underneath your vac for screws... look carefully because sometimes they are sneaky and hidden in weird areas like under the wheels, etc.
3. Take screws out stick them in order on tape turned upwards. (remember how you took them out.)
4. Gently remove the bottom cover.
5. Clean and remove debris, hair, dust bunnies, rocks... whatever.
6. Determine where the belt goes, disengage the beater bar on that side (may need to unscrew something) Belt on beater bar gears. Other end of belt on motor end... then stretch belt with beater bar until it fits back in it's place and replace any screws, etc.
7. Make sure the belt is seated properly.
8. replace cover, screws... test.**

** sometimes belts require that you put a twist in them so it can transition from the motor's direction to the beater bar's direction... if you twist the wrong way... the beater bar will spit dirt out the front of the vac.. (it's bulldozing it) In that case remove cover and twist the belt the other way.

Good luck.

That type of vac is notorious for stopping up where the 90 degree turn is. You may need to access it from the vac head by removing the beater bar or take it apart where ever you can access the turns and hoses.

Yes, you need to replace the belt. You should actually change this belt every year. Here is a link to the belt you need and the manual which has instructions:

Eureka The Boss Smart Replacement Belts

Owner's Guide (3,666K download)

try cleaning the ends of the brush roller. thread gets caught in there and jams it

mine was allowing the roller/beater bar to hit the cover as it turned take the cover back off and ensure the beater is in the right place then that the cover is locked in the right place then you can spin it by hand (power cord unplugged of course) and make sure it is clearing everything. BTW, the belt has to be stretched to get the beater bar in place like on most vac.s

Hello RonD30,
If you are getting suction thru the hose and not from the bottom section.. you have a clog somewhere inline with the base area... If you have access to a shop vac ... unplug the Hoover, open up the base and remove the beater bar /belt assembly.. then hold the shop vac nozzle on the point of entry to where the Hoover pulls the debris into the dirt compartment. I am fairly certain you have a clog somewhere in that ducting.. Stubborn ones may need a little motivation.. so you may be able to get an electricians snake or metal coat hanger bent to release the jam..
Hope that helps..
Regards,
Rick..
And you are right , regarding Lowes..but don't exclude Home Depot from the same rating..LOL Once the sale is done.. so are they...

If the belt is hot or you smell it burning then chances are it has stretched a little and is slipping on either the motor shaft or beater bar shaft. If you are sure the beater bar is not restricted from turning then I would just replace it. Try this.. With the power cord disconnected, open the vac head to gain access to the beater brush and belt.. then remove the belt.. place the beater bar back into its holder and see if it easily turns by hand.. if it is free to turn..then plug the vac in and turn it on for a few seconds.. you will see and hear the motor come on but you should NOT smell anything burning at that time. If you do.. you may have another issue with the motor or power cord or both.. if you don't smell anything burning, then disconnect the power and just replace the belt.... Good luck.