I was watching a movie and the laptop (a toshiba satelite A135) was sitting on my desk far away from me and just stopped playing the dvd. it doesn't read anything! also, my dvd drive broke so this one is new and has been working for the past six months. i have been very careful with my computer after it was fixed so i dont know what caused this malfunction! i uninstalled the drive and reinstalled it and that didn't work. i cleaned the lens and everything and that didn't work. what could the problem be?