Plinius Preamp Remote control problem


I have a Plinius CD-LAD preamp. Recently the volume control remote ceased to working. All other controls on the remote work.
I see that the volume knob moves a little bit and then stops when I press the volume up or down.
Is it a common problem?
Could it be an easy fix? I wonder whether the motor that controls the volume knob needs lubricating.
Any help would be appreciate.
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"Could it be an easy fix? I wonder whether the motor that controls the volume knob needs lubricating."

Pull the knob off and see if the volume control works with the remote.