Lite-on 52/24/52 starting the burn

Hi ,

I had my liteon for almost a year. Sometimes when I start to burn, regardless of application, I hear the drive spin up then spin down then spin up … after a while ( sometimes as long as 40 seconds) the red light will come on and start to burn. I can not figure out why. I thought it may be heat related but I am ruling that out as well as media. Any Ideas?