DEC Keyboards with sticky keys

Douglas Taylor dj.taylor4 at comcast.net
Thu Nov 16 09:48:55 CST 2017


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



More information about the cctech mailing list