Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!decwrl!bacchus.pa.dec.com!shlump.nac.dec.com!regent.dec.com!lasko
From: lasko@regent.dec.com (Tim Lasko, Digital Equipment Corp., Westford, MA)
Newsgroups: comp.terminals
Subject: Re: VT220 Keyboard Error 4
Message-ID: <15391@shlump.nac.dec.com>
Date: 15 Sep 90 20:27:21 GMT
Sender: newsdaemon@shlump.nac.dec.com
Distribution: na
Organization: Digital Equipment Corporation
Lines: 13


In article <1990Sep11.224949.13808@athena.mit.edu>, maddog@athena.mit.edu (Matthew J Marjanovic) writes...
>So, my questions are:  what is Error 4, and is this a problem inside the 
>  VT220 or inside the keyboard?

Could be either.  On power-up, the VT220 tests the data lines to the keyboard,
then if those are ok, invokes the LK201 internal power-up test, and waits for
the keyboard to reply.  If any of these fail, Error 4 shows up.  Any of these
problems will cause this error: bad keyboard port on VT220, bad cable to LK201,
or just a dead LK201.

Tim Lasko, Digital Equipment Corp., Westford MA  (lasko@regent.enet.dec.com)
Disclaimer: My opinions are my own; the facts can speak for themselves.