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Apple keyboard auto repeats 'L'

max1zzz

68000
Hey,

I have just brought a LC to play with and noticed the keyboard had a habbit of typeing the letter 'L' by it's self, so i replaced the two 1uf caps in the keyboard, with on change, i didn't think much of it since the LC needs recapping.

Just to check weather it was the keyboard or the LC i plugged it into my powerbook 1400, and it kept doing the same thing

Further investigation showed it happens most after typing a '3', 'E', 'F' or 'V', sometimes it will do it by it's self, but typing these keys will set it off (sometimes it is a single L, sometimes it just keeps typing it, no other keys set it off (well, L will, but the keyswitch for L is dead, but shorting it's contacts produced the same resualt), oh, and all those ketys do share a track, oddly there are a few more keys on the track, but they don't have the same effect.

I replaced them again, not having any more 1uf caps i used the closest i had, a 1.5uf and a 10uf, but still got the same result.

So i am at a bit of a loss, the only thing i have heard that can cause this (apart from bad caps in the computer, which it isn't as it acts the same on a known good machine) is the caps in the keyboard, but i have replaced them twice with no effect

The keyboard is a model M0116

thanks in advance

-max1zzz

 
Ok, decided to try putting a cermaic cap over the 'L' key (thinking that i was getting some feedback from someware, and that it would eliminate the feedback) and it worked, but with one problem, it prevented the L key from working

So i clipped one leg of the cap, and the l key worked again...

and oddly, i am getting no problems with the keyboard typeing random L's....

so no idea why that sorted it, but it did

 
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