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Old 06-16-2007, 10:12 AM   #1
punkyclown
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Default A1200, acting funny and I don't know why.
My A1200 keyborad is having problems, seems is won't recognize Shift and the num lock. I fiddled with the keyboard cable and that seems to be the problem, not all the contacts are being read. Is there a quick fix, like give it a little snip or something, some cleaner for it or way to clean the contacks?

Thanks
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Old 06-16-2007, 10:15 AM   #2
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Default Re: A1200, acting funny and I don't know why.
Try rubbing isopropyl on the ribbon cable contacts and spraying compressed air in to the connector on the motherboard. Make sure there are no folds or breaks in the ribbon. When you replace the cable make sure it definitely goes all the way in.

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30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
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60  NA-NA-NAAAA
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Old 06-16-2007, 10:20 AM   #3
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Default Re: A1200, acting funny and I don't know why.
no, you'll have to buy liquid silver (expensive) to fix that. check Aminet it has a manual for such repair.
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Old 06-16-2007, 10:33 AM   #4
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Default Re: A1200, acting funny and I don't know why.
Don't you think it is worth at least trying to clean it up first, in case it is just dirt or corrosion?

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10  IT'S THE FINAL COUNTDOWN
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50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
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Old 06-16-2007, 11:02 AM   #5
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Default Re: A1200, acting funny and I don't know why.
Quote:
punkyclown Wrote:
A1200, acting funny and I don't know why.
maybe becouse your a clown?
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Last edited by c64_d0c; 05-07-2011 at 11:26 PM..
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Old 06-16-2007, 11:30 AM   #6
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Default Re: A1200, acting funny and I don't know why.
no, trying to 'clean up' will just make it worse by removing more graphite..
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Old 06-16-2007, 11:36 AM   #7
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Default Re: A1200, acting funny and I don't know why.
the funny is that one speaks about cable and "another" about pads! lol!

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Old 06-16-2007, 02:27 PM   #8
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Default Re: A1200, acting funny and I don't know why.
remove the 20 odd screws strip keyboard apart and use a small amount of meths to clean the circuit membrane & key contacts.
watch out for the caps lock bulb.
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Old 06-16-2007, 05:36 PM   #9
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Default Re: A1200, acting funny and I don't know why.
both solution are valid.
But in first do as Twizzle said.
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Old 06-17-2007, 03:19 PM   #10
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Default Re: A1200, acting funny and I don't know why.
If it's graphite as someone has said in this thread, why not rub a pencil on the contacts to put some graphite back?

This used to work on old 80s calculators.

WTF
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Old 06-17-2007, 03:42 PM   #11
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Default Re: A1200, acting funny and I don't know why.
WotTheFook, because its graphite on the 'plastic' cable/membrane and not on some rubber.
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Old 06-17-2007, 06:23 PM   #12
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Default Re: A1200, acting funny and I don't know why.
Why not simply reinsert the membrane into the conector, just to see if there is a change in the kb behaviour?

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Old 06-17-2007, 06:46 PM   #13
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Default Re: A1200, acting funny and I don't know why.
EDIT: I stand corrected - the pads appear to be carbon.

Still - it should be safe to clean it with a non-abrasive wipe, such as (as Moto originally suggested) isopropyl alcohol with a cotton bud (q-tip, whatever your local lingo is for this).


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