I've read several topics about this issue, but i have another problem.The screen is black all the time.It never opens, but I can hear the booting noise normally.This problem ,at the first time appeared for a few minutes and then it was ok.After a week again the same problem for a few minutes ,and after some rebooting it was ok again.The third time the monitor never opened again.As I said I can hear the boot noise and the the beep after this.
The one beep error that you hear when you boot up the laptop means that there is a BIOS failure. You could repair that either by replacing that CMOS battery, if you have a second one, or you need to replace the whole mother board of the laptop. Please, beware that opening the laptop lid will void the warranty if the lappy still has it. Make sure you have unplugged the power cord and the battery before proceeding with the CMOS replacement. Take it for a couple of mins and then plug it back in, adn try to start.