[Coco] Keyboard

[Robert Emery]

I missed the original post and don't know what your symptoms are but lately one
of my CoCos has had an intermittent keyboard row failure making me think bad
keyboard or failing PIA line...

Recently it got worse and then I discovered that a gentle pressure on the
ribbon just above where it plugs into the motherboard fixes it. Pressing gently
toward the front of the machine keeps it working perfectly, implying that the
connector is showing signs of fatigue.

Bob

--- BillG <cwgordon at charter.net> wrote:

> I went over the entire KB sheets with a magnifying glass and found no
> breaks, smears, or anything.
> 
> I was able to repair CoCo1 keyboards using silver paint years ago, but as I
> said there were no breaks this time.
> 
> I dunno, maybe I'll run across another machine at a local swap meet someday.
> 
> Thanks 
> 
> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
> Behalf Of PaulH96636 at aol.com
> Sent: Monday, July 11, 2005 11:23 AM
> To: coco at maltedmedia.com
> Subject: Re: [Coco] Keyboard
> 
> Look carefully at the keyboard connector ribbon to see if there are any
> breaks in the embedded traces leading to the connector.
> I found a cut across one of them in a coco-1 years ago, as if a box cutter
> had been used to open a box of keyboards before installation into the coco.
> After a few years of use, one or more of the traces did open up, but I
> didn't try to fix it because I had just decided to buy a coco-2.
>  
> However, perhaps if a cut is the problem, try using some nickel print or
> conductive paint to regain contact. As I haven't tried this specifically on
> a coco kb, can't say how effective this might be (seems the plastic coating
> covering the traces would need to be carefully scraped away to expose both
> sides of the break).
>  
> -ph
> 
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