I just purchased a used iPad 2 off of craigslist and have a problem with the "a" key repeating 2 or 3 times almost every time I hit it. Is there as any kind of fix for this? I know it had been dropped and a new screen was installed. Everything else seems to be fine but this is annoying. Got it for a good price so I could take it to Apple for a fix if I have to. Thanks for any help.