How do I fix this problem (Beeping and black screen on startup)

For the past 3 months, every time I shutdown my alienware M17x and I open it or I restart it , it just keeps beeping and it displays a black screen, its just a contineous beep, it never ends and then I shut it down and open  it a couple of times until eventually it opens as of nothing happens but if it closes or restarts or shuts down again it does the same thing over and over again and I'm tired of it . I know there had to be something wrong with the internals but I just don't know what I think it might be ram but I'm not sure please help!