Power button not engaging...vacuum will not stay

• You will need to remove the switch cover and replace the main power switch.

Try resetting your dyson vacuum using this link:

http://www.ehow.com/how_5943288_reset-dyson-vacuum.html

The switch is broken. If you are handy, remove the old switch and match it up at a hardware store or a Vacuum repair shop. It shouldn't cost much to have it replaced by a proffessional either.

Sounds like your switch has gone.

Its simple to replace, only 1 "specialist" tool is needed, but you can substitute for a small screwdriver.

If you visit http://www.sparesaver.com/help-and-support/dyson-section/dyson-technical-advice-450/ they have alot of info on repairing dyson cleaners AND they sell the parts, cheapest ive seen online.

Hope that helps

My vacuum had this exact same problem, but was out of warranty because it was remanufactured. Thankfully, it's a very quick, five-minute fix.

1. UNPLUG The Vacuum!
   
2. Remove the cannister.
   
3. Extend the handle and remove it.
4. Remove the two torx (T-15) screws behind the power button, where the handle normally stows.
5. There are four tabs holding the front plate containing the power button on; use your screwdriver to release them.
6. Gently pull the front plate off.
7. The switch on the right is the power button. Remove it, try clicking it a few times; if it sticks, great! Replace it and reassemble, otherwise you'll need to replace it.

needs switch , dyson has lots of switch problems.

is it a switch or a push button?

You can't fix this problem yourself - a repair dealer needs to open up the button and inspect the power switch - call the Dyson helpline, they will find the closest authorized dealer in your area and if your machine is still under warranty it'll probably fixed under warranty for you.

My vacuum had this exact same problem, but was out of warranty because it was remanufactured. Thankfully, it's a very quick, five-minute fix.

1. UNPLUG The Vacuum!
   
2. Remove the cannister.
   
3. Extend the handle and remove it.
4. Remove the two torx (T-15) screws behind the power button, where the handle normally stows.
5. There are four tabs holding the front plate containing the power button on; use your screwdriver to release them.
6. Gently pull the front plate off.
7. The switch on the right is the power button. Remove it, try clicking it a few times; if it sticks, great, it should now stick when you press the power button. Replace it and reassemble, otherwise you'll need to get a new switch.

The on/off switcdh underneath the button sounds like it's faulty and will need replacing. I would suggest caling Dyson in your country with the Serial No of the unit for guidance.