DEC VT420 Service Manual page 29

Table 2–3 (Cont.) VT420 Display Error Codes
Error Message
RS-232 Port Data Error - 2
(worldwide model only)
RS-232 Port Controls Error - 3
(worldwide model only)
Keyboard Error - 4
DEC-423 Port Error - 5
Printer Port Error - 6
Section numbers follow the solution.
Troubleshooting and Testing 21
Solution
11. If the error continues, replace the
terminal board (3.3).
Replace the terminal board (3.3).
Replace the terminal board (3.3).
1. Make sure the keyboard is plugged
in.
2. Replace the keyboard (3.4).
3. If the error continues, replace the
terminal board (3.3).
Replace the terminal board (3.3).
Replace the terminal board (3.3).