Hi Norris, most domestic microwaves do not use turntable drive belts, they use a direct drive 240v motor situated beneath the cavity and above the outer base plate. If the motor has gone look to £16 for the part alone. First check to see if the clover leaf shaped drive for the glass tray is not broken, ie spinning freely. For any further help find me via microwave-repairs.co.uk
kindest regards
patrick, July 2009