My electrolux oxygen vacuum wont go and i suspect power supply to the motor or the motor itself

The silver cover is a pressed in panel... (so called "three minute job".. hazardous, quite DEADLY voltages will be UNCOVERED.. use EXTREME caution)
and requires pretty good pressure to get it off... enough where a careless move can damage the cover.
Carefully:
Look at the back of the panel: there are two 1.25 inch (approx) wide slots.
(just imaging a battery flap on a cheap remote controller)
If you can gently introduce a blunt end putty knife into the slot and firmly push it straight forward (toward the hose end (there is a plastic friction tab at each outside end))... with a lifting action you will see the panel start to lift ... you will be able to see the tabs
if you look closely.
Insert your thumbnail on the much stronger corner and pry upward (this requires a lot of force and the corners are the strongest area... breaking the cover is very possible)
Once the silver cover is off you will see the two T20 Torx screws.
Removing them will only loosen the back end... which you should -exercise some caution here... that LED bracket is loose and all the weight is on the wires of the LEDs.
Now set the Vac on in the upright position (nozzle to the ceiling).
Complete release of the top is done by opening the bag compartment and pushing a through the red rectangles in the upper hinge wall. These are latched tabs and will easily lift once the tab is pushed in enough (try not to gough or mar... rememeber it is only plastic).
Both the bag cover and the back cover will lift.
Leave the bag cover and gently negotiate the back cover from inside the handle.
You can now see the big board SUMO (suction motor control board )...
If the glass fuse is not blown... and there are no obvious soot marks...
Take it to the VAC Repair for a free estimate.. They'll tell you it is the hose!!
(which is indeed the biggest failure point of these machines).
Hose slip rings can be inspected <dust & lint>and cleaned (PLUS ruined... Highly likely if you don't get the contacts back in their respective slots) by one screw on the wand end... or three screws on the control/handle end (inside tool carrier recess).