I have a G4 laptop that is about 2 years old. It was working fine then died when I was in the middle of something. My computer literate friend has tried everthing to reboot it but it just won't start up. When I try to turn it on it beeps 3 times and the front light blinks quickly 4 times. Is this a message to say what is wrong? Do you think this is a fixable problem?? Any suggestions would be greatly appreciated.