Solving Usb Problems - Compaq Armada M300 Series Reference Manual

Solving USB Problems

Problem
External device
connected to the USB
connector does not
work.
External device
connected to the USB
connector does not
work during
startup (before
Windows 95 or
Windows 98 loads).
A New Hardware
Found message
displays although the
external device was
previously recognized.
Solving USB Problems
Possible Cause
The computer is When the computer is running
running Windows NT 4.0, only two tiers are
Windows NT 4.0. supported by the USB connector.
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.
During startup, only Use the external device only after
two tiers are Windows 95 or Windows 98 has
supported by the loaded.
USB connector.
Reduce the number of connected
These tiers can
external USB devices to no more than
include no more
two hubs on the first tier, and no more
than two hubs on
than one keyboard and one pointing
the first tier and no
device on the first or second tier.
more than one
keyboard and one
pointing device on
the first or second
tier.
The device was No action is required.
previously
Connect the external device to the
connected to a USB
same USB connector each time.
connector on a
docking base.
Solution
Continued
15-25