Hi there and welcome
there is no fuse inside the unit, if no lights are showing at all, then the power board in the power supply has failed (will be a blown capacitor)
If you have checked the power socket is ok, this is the only other cause for this.
I am really sorry about this and you are going to have to return the printer 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.