Hi, I'm fairly new to dvd burning. I have a sony labtop with a matshita uj-810 cd/dvd burner. I've burnt about 40 or so dvd's with fair success so far, but about a week ago my drive quit recognizing all types of cd's. Now it's slowly beginning to do the same with blank dvd-r's and movies. When I do get a chance to burn, Nero's giving me a power calibration error. I haven't made any changes to the computer that should cause this. I've tried to uninstall the burner as well as all the IDE controllers, Nero, DVD Decrypter, and Dvd Shrink, but it's not helping. All my drivers are up to date also. Another thing is that the event viewer in administrative tools says "The driver detected a controller error on /Device/Cdrom0." Can anybody help me?