Apple //e Platinum keyboard issue
I am an old school apple II guy who recently decided to buy some old machines (used the library machines when I was a kid, couldn't afford them), but my apple //e platinum is having some keyboard issues. I am hoping to get some insight or assistance troubleshooting it.
My "2 w d x c" keys do not work. I have a suspicion that it is the UE14 IC (in this case a KR9600-PRO), but I can't really be sure. C70 looks ok, but who can say. I think that would only cause issues with timing anyway, not a group of keys never working at all.
1) Is there a way to determine if its the keys or the decoder (maybe with an ohm meter?) with any certainty?
2) Could it be something else?
3) Where can I get a replacement keyboard decoder, if I need to replace it?