Graffiti pad does not work. Can't finish the startup tap here, tap there sequence. Can I get a replacement pad and install myself or might it just be a bad connector? I do not expect to get a replacement from my ebay seller.

Background.
Got a 7135 on ebay 4 days ago. Looked fine, worked fine except for graffiti entry. I have a 6035 that I love except wanted the brighter screen of the 7135. I attributed the graffiti entry problem to Graffiti 2 and tried without success to replace it. Finally I loaded trial of Teal Script which showed me that the Graffiti pad was not rendering at all what I was scribbling. The number side wasn't bad. The alpha side was useless. Finally after a soft and hard reset, I can't exit calibration and have switched service back to the 6035.