IBM 704 User Manual
Page 269
Troubleshooting
Serial Port Problems
Action
The number of serial
ports displayed is less
than the number of serial
ports installed.
Verify that:
1. Each port is assigned a unique address.
2. The serial-port adapter, if you installed one, is
seated properly.
If the items above are correct, have the system
serviced.
Printer Problems
Action
The printer does not
work.
Verify that:
1. The printer is turned on and is online.
2. The printer signal cable is connected to the correct
serial or parallel-port on the system. (For the
location of the serial or parallel port, see the User's
Reference.)
Note: Non-IBM printer cables might cause
unpredictable problems.
3. You have assigned the printer port correctly in
your operating system or application program.
4. You have assigned the printer port correctly using
the Setup program.
If the items above are correct and the printer still does
not work, run the tests described in the manual that
comes with your printer. If the tests show the printer
is OK, have the system serviced.
Chapter 5. Solving Problems
251