hi iv recently bought 2x technics 1210 mk turntables and a numark dm1050 mixer. i have a problem with my mixer, when i go to crossfade one of the songs over to the other side it usually fades the sound untill completely gone but it does not anymore it also makes a fuzzy noise when fading. iv only had it for about 3 weeks and dont think i need a new crossfader but im not sure. can anyone help me out?