Hi there and welcome
You only need to push the slide switch to on and it should then star. There is no trick to it.
If you have tried multiple wall sockets for power and it still will not start then it is the motor that has faulted.
I am really sorry about this and you are going to have to return the unit to have this replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
I am really sorry about this, and if you have problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service, that would be greatly appreciated.