I have a Dell Inspiron and have had it for a year. Over the past week, when I have been using the computer it stops responding and I am unable to do Ctrl Alt Del or do anything except a hard shut down. This has been happening at least 5 times a day. It is also not shutting down now.

I've tried the [Fn] test by holding the Fn button while powering on the laptop. After a minute I get a set of 5 musical notes in a row that repeats 2 or 3 times, followed by a singular note 3 times, and then the muscial cycle repeats.

My AlienWare 51 continues to reboot after being logged into the OS for 5 minutes. I purshased a new PSU, a new MotherBoard(same model as the one that comes with the X51) I puled each Graphic Card one at a time, same with the RAM. I even re-installed the OS.