User of the mobile disco in 1200 since 1982, and now at home cause cessation of activities. A single point in 83 of a plate change, the start had become too slow, I do not have the lacated cause.donc I changed the set and everything is back in odre. now pass to mp3 vinyl always with the 1200 + cell shure m44 / 7 + professionally in theater still without any problems. good material !!!!! !