This sounds familiar...
Isn't this part of the display CPU self-test mode functionality, or
something like that
Wasn't something like this discussed on this list about a month ago or so

BR,
Peter

----- Original Message -----
From: wesleyknick
To: oberheim@yahoogroups.com
Sent: Wednesday, July 18, 2012 10:47 PM
Subject: [oberheim] Re: Oberheim Matrix 6, Dead


Most of the time it just powers on with a string of characters in the
display and pressing the keys simply enters new characters in the display as
though I'm typing them in.