[Coco] Melted Keyboard Repair

[Kevin Becker]

So I took a razor and clipped all the plastic welds holding the
keyboard in place.  Quite a few had broken off already, which I assume
was the source of the issue.  The good news is that my mylar membrane
is in great shape.  The faulty keys were due to the small springs that
press against the mylar coming loose on the problematic keys.  Probably
because the broken plastic welds allowed the keyboard to flex enough
for them to get loose.  The rattling sound has me really puzzled
though.  I'm sure the springs were part of it, but the majority seems
to have come from a bunch of small metal balls loose inside the
keyboard.  I think there were 9 of them.  They are much smaller than a
BB, more like the ball in a ballpoint pen, but a bit bigger than
those.  Does anyone know what purpose they could possibly serve?  
On Sat, 2020-02-01 at 22:00 +0000, Mark Marlette wrote:
> Kevin,Never sold any replacement membranes.That was a prototype
> project that I wasn't happy with. Needs a rev turn.Regards,Mark
> Marlette http://www.cloud9tech.com
> mark at cloud9tech.com
> mark at gamecamaddict.com 
>     On Saturday, February 1, 2020, 03:31:08 PM CST, Kevin Becker <
> kevin at kevinbecker.org> wrote:    I have a CoCo2 with the "melted"
> keyboard that I picked up as part of abundle at some point. I got an
> oscilloscope for Christmas so I finallydug it back out to look into
> some issues it had and test out the scope.The display is working
> properly now but I've discovered several of thekeys don't work. 
> There are several bits rattling around inside thekeyboard itself.  I
> wanted to take it apart to have a look but it iswelded shut with
> melted plastic.  
> Is there a good way to open it up?  Melt the welds?  Drill them out?
> Any other repair tips?  I've heard it mentioned that CLoud9 once
> soldreplacement membranes but I've never seen them on the site.
> 
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