Try downloading the service manual here:

http://www.hifi-manuals.com/Download/Dual/1219-service-manual

What type of table is it as far as the drive method? Could be a loose wire, bad circuit card broken belt or a bunch of other minor stuff. Make sure the motor is getting power and is free to spin. Some TT have a driver wheel under the platter which can wear out over time. Make sure it isn't in some sort of transport condition where the platter is physically restricted from movement for shipping.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner