Does your HP have only one fan? Let me answer: (er, no.) - so are ALL your fans working, including CPU & Graphics Card (if any)? Open it up, blow out the dust and take a good look at everything. Computers are never wrong! ;-)
it only has one fan that i see lol unless theres one under the processor heat sink and i blew out all the dust and checked everything it boots up to windows when i press f2