IBM 628791U - PC 300 GL, User Manual

Page: 129 / 176

Parallel Port Problems
Serial Port Problems
Option Problems Action
An IBM option that
previously worked does
not work now. Verify that all of the option hardware and cable
connections are secure.
If the option comes with its own test instructions, use
those instructions to test the option.
If the failing option is a SCSI option, verify that:
1. The cables for all external SCSI options are
connected correctly.
2. The last option in each SCSI chain, or the end of
the SCSI cable, is terminated correctly.
3. All external SCSI options are turned on. External
SCSI options must be turned on before the system
is turned on.
For more information, see your SCSI documentation.
If the problem cannot be corrected, have the computer
and option serviced.
Parallel Port Problems Action
Parallel port cannot be
accessed. Verify that:
1. Each port is assigned a unique address.
2. The parallel-port adapter, if you added one, is
properly installed and firmly seated. See
Chapter 7, “Installing Options” on page 53 for
instructions on adding adapters.
If the problem cannot be corrected, have the computer
serviced.
Serial Port Problems Action
Serial port cannot be
accessed. Verify that:
1. Each port is assigned a unique address.
2. The serial-port adapter, if you added one, is
properly installed and firmly seated. See
Chapter 7, “Installing Options” on page 53 for
instructions on adding adapters.
If the problem cannot be corrected, have the computer
serviced.
Chapter 8. Troubleshooting
115