somebody on youtube said almost the exact same thing to me, but i have used my 350's at parties that have started at 10pm and finnished about 5-6am and never once had this issue, there is an auto shutdown fuction on the CDJ but that shouldnt happen while they are in use, however i would disbale the feature just to be sure. press down the utility button for a couple of seconds, turn your rotar dail to auto standby, and turn it off. i am not sure if it will help you or not but it is worth a try