New 6650a Power calibration error with CDRs

Hey guys, i just burned about 4 cds and then suddenly out of no where it will not burn any. I got cheapo cds but i’m going to borrow some different brand cds off my friends to see if they work. I saw with other NEC burners people have this problem also, Is this a common problem with NEC’s? Anyone have this problem with the 6650?