Obviously 
aids should go back to a repairer for ‘proper’ servicing, but if you are going to have a look, make sure you are properly grounded with an anti ESD mat or similar to put the stuff on.
Obviously aids should go back to a repairer for ‘proper’ servicing, but if you are going to have a look, make sure you are properly grounded with an anti ESD mat or similar to put the stuff on.