12-22 Troubleshooting
Writer: Karen Williams Saved by: Rebecca Wiggins Saved date: 01/26/98 11:52 AM
Part Number: 203118-001 File name: Ch12.doc
Solving USB Problems
If the USB (Universal Serial Bus) device you are troubleshooting
is an external keyboard or an external pointing device, refer also
to “Solving External Keyboard Problems” and “Solving External
Pointing Device Problems” in this chapter.
Solving USB Problems
Problem Possible Cause Solution
External device
connected to a
USB connector
does not work.
Computer does not
support USB.
USB is not supported by
Armada 7700 and
lower computers.
USB-equipped
computer is
not docked.
Dock the
USB-equipped computer.
Docked computer is
USB-equipped, but
the operating
system limits
external devices
connected by USB
to two tiers. These
tiers can include no
more than two hubs
on the first tier and
no more than one
keyboard and one
pointing device
on the first or
second tier.
Reduce the number of
connected external USB
devices to no more than two
hubs on the first tier, and no
more than one keyboard and
one pointing device on the
first or second tier.
Connect the external device
to another connector.
Continued
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