On 30/09/2008 18:20, "Charles" <charlesmorris800 at centurytel.net> wrote:
  I turned on my VT220 for the first time in nearly a
year. The
 screen says "VT220 Keyboard Error 4", all four green LED's (on the
 top right of the keyboard) stay lit, and nothing appears on the
 screen when I type.
 Disconnecting and reconnecting the coiled-cord between the
 keyboard and the terminal causes a cursor block to appear on the
 screen, but the keyboard is still locked and the LEDs stay on.
 Power-cycling the terminal shows the same error message.
 However, the boot prompts from the 11/23+ are displayed normally,
 so the receive part of the terminal at least is working.
 Where should I start looking, before replacing the keyboard? 
Start with the keyboard - error 4 means the VT can't detect it.
--
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?