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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.
Problem
External device
connected to a
USB connector
does not work.
12-22 Troubleshooting
Solving USB Problems
Possible Cause
Computer does not
support USB.
USB-equipped
computer is
not docked.
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.
Solution
USB is not supported by
Armada 7700 and
lower computers.
Dock the
USB-equipped computer.
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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