My brother has an HP Pavilion dv6308nr laptop that was working fine until just a little while ago. Our younger brother was sitting at it for about ten minutes at the Vista welcome screen (he doesn't know the password) and closed the screen. My brother (that owns the laptop) opened the lid and hit the power button to boot it up. Everything loaded up normally past the "Windows Did Not Shut Down Correctly" screen up to the loading bar, which froze. My brother rebooted his laptop and all it does now is constantly reboot itself. The fan starts up, goes for about five to ten seconds, the laptop makes a "NEEEEurrrrhhh" noise, turns off, boots back up, and repeats this cycle over and over again. Does anybody know what could be causing this and how to fix it?
Thanks,
Ryoken