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Re: Apple II+ Keyboard repair



On Mon, 17 Oct 2011, D Finnigan wrote:

kynrek wrote:

However the keys are not showing the right characters. for instance
the letters s and d both output the letter w, most of the number keys
output a ?.

I had a problem like this a few months ago, and as I recall, it was because
some of the key switches were stuck in the closed position. Now the cause
was probably different: I had washed the keyboard, and there was still water
making a circuit in some of the keys.

But I would figure a washing might just be what's needed. Either because the keys stick, or something sticky has been spilled on the keyboard and is shorting out contacts somewhere.

I had an "IBM" keyboard apart recently and it was pretty disgusting.

It seems daring to actually wash a circuit board, but so long as one dries it very carefull (be patient, sit it out in the hot sun, or even put it in the oven at a very minimal temperature for a few hours).

I once found a decent stereo receiver in a snow bank, and it had picked up a lot of salt. I was bold, washing it though avoiding getting the transformer wet, and I let it sit for some time before I tried it. It worked fine, probably would have been fine without the washing, but I was more worried about long term corrosion from the salt. It kept working until I found something more interesting.

    Michael