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54
xSeries 370 Installation Guide
Universal Serial Bus
(USB) port problems
The number of serial buses
displayed is less than the
number of serial buses
installed.
A USB device does not work.
Printer problems
The printer does not work.
Expansion enclosure
problems
The SCSI expansion
enclosure used to work, but
does not now work.
Action
Verify that:
1. Each bus 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.
Verify that:
1. You are not trying to use a USB device during POST if you
have a standard (non-USB) keyboard attached to the
keyboard port.
Note: If a standard (non-USB) keyboard is attached to the
keyboard port, then the USB is disabled and no USB
device will work during POST.
2. The correct USB device driver is installed.
If the problem still persists, have the system serviced.
Action
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
and parallel ports, see "Cabling the server" on page 36.)
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
Configuration/Setup Utility 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.
Action
Verify that all of the SCSI expansion enclosure hardware and
cable connections are secure.
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. (Refer to the User's
Reference on the IBM xSeries Documentation CD for more
information on SCSI termination.)
3. Any external SCSI option is turned on. You must turn on an
external SCSI option before turning on the server.
For more information, see your SCSI and expansion enclosure
documentation.
If the SCSI expansion enclosure comes with its own test
instructions, use those instructions to test it. In addition, test the
power supply.
If the items above are correct and the test programs found no
problem, have the server and SCSI expansion enclosure
serviced.
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