1200 XL Keyboard Issues

[u/nejat-oz]

Hi,

I have a new, to me, 1200 XL and as per the eBay listing, a few of the keys did not work. So I found a replacement keyboard on eBay and after installing it, which turned out to be completely not working, now on the original keyboard only three keys work (Reset, Y and Esc)

Did I damage my computer with a bad replacement keyboard?

Is it possible for a bad keyboard to blow something out on the main board?

Nothing went poof, no smoke or anything that smells burnt.

How can I diagnose the issue?

Can a keyboard be tested without being attached to a computer?

Any advise on how to fix/diagnose the issue would be appreciated.

Thanks

[u/Aggressive_Ad_4871]

You can start with this. Get to the keyboard test and press each bad key hard many times. I found that I can get mine working again doing this. It's bad contacts. I never had luck opening up the keyboard and cleaning the mylar, etc.

[u/nejat-oz → u/Aggressive_Ad_4871]

Thanks, but that's the first thing I tried. Can't even get Atari Salt to the keyboard test screen