i'm probably wrong, but to me it sounds like the leads inside the tonearm are shorting out. If that's the case the only thing i know to do is replace the tonearm assembly. But im most likely wrong and misunderstood your question b/c i'm going on 20hrs+ now. If it's just the contacts in the headshell mount, you can try to use isopropel alcohol and water w/ a q-tip to clean it.

PS, check out the crazy thing i found out about shure whitelabels and m44gs in the "i ****ing hate whitelabels" thread.

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