"Fred" warydragon--at--gmail.com wrote in message
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Please help, I do not know how to diagnose this?

Thanks,

Fred

If you have mirco switches in the controls, one of them may have built
enough metal dust inside to short out, keeping the circuit active, even if
the handle is moved to a different position. I have had that experience
twice with the Graziano lathe I own. It's easy enough to check for
shorting by disconnecting the micro switch from the circuit, then testing
for continuity on the circuit that should be normally open when the lathe is
in neutral.

Harold