The motor grommets often cause hum- but usually when the needle is on the LP surface (we have new grommets BTW).
So if you lift the arm from the arm rest and then lower it in such a way that it does not touch the platter or the arm rest, does it still hum?
Does it hum with the motor switched off?
So if you lift the arm from the arm rest and then lower it in such a way that it does not touch the platter or the arm rest, does it still hum?
Does it hum with the motor switched off?