DEC Keyboards with sticky keys

[william degnan]

On Thu, Nov 16, 2017 at 10:48 AM, Douglas Taylor via cctech <
cctech at classiccmp.org> wrote:

> I have a couple of LK401 keyboards and they generate a 'keyboard error -
> 4' error on power up test when attached to a VT420.  The problem seems to
> be one or more keys that are 'stuck on'.
>
> When the keyboard is turned upside down and shaken I can get the self test
> to pass.
>
> Is it possible to open the keyboards and repair this type of problem?
>
> I also have LK411 keyboards that have a PS/2 type of connector, is there
> an adapter to let me use these keyboards instead of the LK401s?  Are the
> signals the same, only the connectors being different?
>
> Doug
>
>
Try this?
http://microvax2.org/wp/2017/05/24/lk402-aa-keyboard-fix/

If this is like your keyboard, you can use a product called Keypad-fix