Check the continuity of the turntable ground wire. Secondly make sure that the ground termination makes it to the tonearm. An SME 3009 tonearm as an example is mounted on rubber grommets. If the cable ground is terminated at the chassis it may never make a physical connection with the tonearm. Another interesting issue is if the tonearm wires employ the use of Litz wire where the strands are individually insulated. If so the insulation has to be scraped off before soldering.
Just sayin,
Starwarrior
Thorens Td124/Mac Ma275/Mac C2700/Manley Massive Passive/Brennan B2
Just sayin,
Starwarrior
Thorens Td124/Mac Ma275/Mac C2700/Manley Massive Passive/Brennan B2