Error Codes; Vt420 Display Error Codes - Digital Equipment VT420 Service Manual

20 Troubleshooting and Testing
6. Set up the terminal (Sections 2.2.1 and 2.2.2).
7. Type the following sequence: ESC
#
8.
The screen displays a test pattern of uppercase E's.
8. Press the
~
(Print) key. If the printer is operating correctly, the test
pattern displayed on the screen should print out.
2.4 Error Codes
If the self-test finds an error, the terminal
• Stops operating
• Makes the keyboard bell tone sound
• Displays an error message in the upper-left comer of the screen
Table 2-3 lists the error messages and solutions.
Table 2-3 VT420 Display Error Codes
Error Message
VT420 NVR Error - 1
*Section numbers follow the solution.
Solution•
1.
Press~ (
IA1tl
I
SetUpl)
to
enter
the Set-Up Directory.
2. Move the cursor
to
the
Default
field and press
!Enter~
3. Move the cursor
to
the
Save
field
and press
I
Enter~
4. Move the cursor
to
the
Global
field
and press
!Enter~
5. Move the cursor
to
the second
field on the second line. Press
I
Enter!
until the setting changes
to
Sl-Comml,S2•Comm2.
6.
Press ~ (
IA1t
11
Set Op
I )
to
leave
set-up.
7. Press
~
to
switch sessions.
8. Repeat steps 1
to
3 for the second
session.
9.
Press~ (
IA1tl ls.top
I)
to
leave
set-up.
10. Turn the VT420 off, then on.