It's a Dell inspiron mini and i've only have it for 12 days. i was using it today and the screen started flashing colors and it beeped so i turned it off and tried turning it back on and it would beep at me. i took the battery out then put it back and it turned on and was fine then like 20 minutes later it would flash colors again.it's fully charged. it happend 3 times so far today. anybody know why it's doing this?