Welcome.
How long have you had your crossfire?
Have you done anything to it recently?
How is the battery in the remote?
Have you unhooked the battery waited 15 min the rehooked it up?
Be aware if you do that 15 times with no start the computer will self destruct.
You can also search the
Mystery no start.
Have you done the sticky key fix?
Or changed the batteries in remote rescently?
Would give seem issues.
Does it turn over at all?