i just got a teac model 5 in from ups. mixer is in great cosmetic condition. the only thing is that when i flick the power switch, the vus and lights flash for a second and then go dead. it is not connected to anything as of right now. it is just plugged in to the wall socket. does this thing need to be grounded to something before it stays on? i do not have a manual for this thing. help... please... lumin by the way im excited about having this thing. really looking forward to using it a lot... if i could just get it to stay on. if anyon does have a copy of the manual they would be willing to let me get, it would be much appreciated thank you in advance!