My dad's laptop will not cut on, I reformatted it and it worked fine until it went to sleep then I could not get it back up. I figured it was the internal battery and it was having a problem saving the BIOS. I replaced it still nothing, it won't even post. Every onece in a while it will give me two solid BEEPS when powering up. What are the audible warings for this particular model and do you have any suggestions, I'm still a novice when it comes to these things.