This has been happening since I had to re install my operating system. The computer starts up and everything seems to be working just fine, other then the screech it makes when starting up. The one thing that hasn't been working since my re install are my speakers that came with my dell, but an older pair of speaker seem to work. Mabye this has something to do with it? I read beeping noises could be a loose connection or hardware but I checked all that.