HELLO.. I have a CD-rom and a DVD burner so I got another DVD burner and I put it where my old DVD burner was, and put my old DVD burner where my CD-rom was.. so after I did that I turned on my PC and it just Light on the little llight but won't come on and started to beep... then I canged all back to normal again... BUT it does the same, it doesnt stop beeping and the screen and keyboard won't come on.. can someone help me please....