IBM 3174 Reference Manual page 71

Common Problems
Table 4-1 (Page 2 of 3). Problem Resolution with ASCII Terminals
Symptom
Probable Cause Action
Nothing appears on the screen. The controller may be waiting
for an autobaud sequence.
Press the Carriage Return (CR) key. type
a period (.). and then press the CR key
again. You may need to do this several
times.
No connection
Check your cables.
Setup mismatch with
customizing
Read the setup information for your
terminal by going into setup mode.
Refer to Appendix B and verify that your
terminal setup matches the information
in that appendix. Consult your system
administrator.
Keyboard locked
Check the status line to determine the
cause of the keyboard lock. Press BSC ?
to view the status line if your terminal
does not have a 25th line. Use your
Reset key sequence to clear the
condition.
Flow control hang Send XON (CTRL Q).
Modem problems Check that data is arriving at the 3174,
and that it is the same as the data keyed
at the ASCII terminal.
Display screen shifted up one
line
Incorrect auto-scroll or auto-NL
settings
Refer to Appendix B, and verify that your
display does not have auto-scroll or
auto-newline set to ON.
Keystrokes not accepted Keyboard locked Check the status line to determine the
cause of the keyboard lock. Press BSC ?
to view the status line if your terminal
does not have a 25th line. Use your
Reset key sequence to clear the
condition.
Consult your system administrator to
determine if Type Ahead has been
disabled on this controller through 3174
configuration.
Session ends unexpectedly
Host connection lost
Consult your system administrator.
Inactivity time-out
You may have left the terminal idle too
long. Consult your system administrator
for assistance.
Double characters displayed on
screen
Incorrect terminal setting
Turn off local echoing of characters by
the terminal.
Receiving incorrect characters
Customizing error
Consult your system administrator.
Unable to autobaud
Customizing error
Make sure that the terminal is setup so
that the carriage return key sends a CR.
Make sure the number of data bits
supplied by the terminal matches the
3174 configuration.
File transfer does not work
Customizing error
Make sure that the file transfer aid bit is
turned on.
Chapter 4. Solving Some Common Problems 4-3