Re: Lisa keyboard

From: Ray Arachelian <ray_at_email.domain.hidden>
Date: Tue, 19 Feb 2008 12:37:50 -0500

Blair Aakre wrote:
> I have a Lisa keyboard that, when plugged in to my Lisa, causes a keyboard error during POST. It appears to be a problem with the logic inside of the keyboard, as I have swapped everything I can with a working keyboard and the keyboard PCB seems to be the culprit. Is there anything special about the controller chip? Does anyone have a keyboard for parts? The key switches on this keyboard are in really nice condition otherwise.

If I remember right, there's an Intel microcontroller in these, which you could replace - if you could find a replacement, except that you'd need a way to program it. :-( In other words, not very easily unless you find another dead Lisa keyboard.

I'd try to replace the plug/cord first and see if that might help. Also look for shorts. Keep in mind this is a capacitance driven board, so any shorts past, or present, could have damaged the controller.

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