When I turn my laptop on it comes up with this constand loud beeping noise.
It usually happen when it gets to the loading part saying:
"Primary master"
Does the laptop get beyond trying to detect the Primary Master (as in load Windows or whatever OS you're using)? Or does it just freeze at that screen?
If the machine simply freezes there or prints out an error message about an invalid system disk, it could be that your hard disk has failed, in which case the laptop cannot find a drive to boot from.
I think thats the problem, the strange thing is sometimes it loads up sometimes it doesnt.