🚀 go-pugleaf

We're having quite a problem with certian rev of ZKB-2 keyboards. The keyboards
in question all have rev 1.2 of the keyboard controller chip and the date of
5-6-87.  The problems we're having are similar to the one in message 35413.
The left shift key "seems" to stick.  We can recreate this at will.  Keyboards
with the revision 1.04 work correctly.  The way we recreate this problem is
with Smarterm 340 for DOS, logging into the VAX or editing in WP 5.0 for VMS,
if we hit the "editing" arrow keys the keyboard will then "stick".  The only
way to "unstick" it is to tap the left shift key.  Is there a keyboard
controller chip that will correct this problem?  Or do you have any ideas?  We
have at present 32 keyboards with this problem. (we have about 3000 Zenith
systems).  

Thank you,  
Joe Sigmon 
NASA Lewis Research Center 
Technical Support Department.