Isn't that the error code you get when the keyboard is not connected?
That's easy to check ... if so: check the plug for dirt (bad contact) and
check the cable for a broken wire inside ...
- Henk.
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From: "Jacob Ritorto" <jacob.ritorto at gmail.com>
Sent: Wednesday, January 11, 2012 11:04 PM
To: <cctech at classiccmp.org>
Subject: Re: VT220 Keyboard Error 4?
ever figure out how to fix this? All twenty of my
(poorly warehoused)
vt220s are doing this!
thx
jake