Rich Willbanks writes in a message to all
 RW> On the old remotes I've taken a part there seems to be a little 
 RW> piece of carbon  over a open circuit and when you press 
 RW> the button the carbon completes the circuit.
It's actually carbon impregnated rubber.  There is so much carbon that the 
rubber conducts electricity.  But the surface will wear and you are left with 
less conductive material.  At that point the rubber often starts tearing 
around the keys too.
  
 RW> In the past I've tried cleaning both the contact on the circuit 
 RW> board and the carbon 'button' with varying success.
  
The only cure is to clean the board and replace the rubber membrane.  Make 
sure there is no dust trapped under the keypad when you install it or it will 
give you fits.
 RW> I'm hoping that there is an fairly easy fix, maybe a conductive 
 RW> paint for the 'button', or some thing. I hate to think that 
 RW> I'm going to have to replace the entire thing because of this. 
Contact the manufacturer for replacement membranes.  This is a fairly "high 
fail" part so they should be available.
 
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