Compaq Armada 7800 - Solving USB Problems; External Device Connected to a USB Connector Does Not Work; External Device Connected to USB Connector Does Not Work During Startup (before Windows 95 Loads)

Troubleshooting 16-31
Writer: Rebecca Wiggins Saved by: Rebecca Wiggins Saved date: 02/06/98 11:08 AM
Part Number: 314932-001 File name: Ch16.doc
Solving USB Problems
External device connected to a USB connector does
not work
Possible Cause
The operating system limits external devices connected by USB to
two tiers which 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
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.
External device connected to USB connector does not work
during startup (before Windows 95 loads)
Possible Cause
During startup, only two tiers are 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.
Solutions
■
Use the external device only after Windows 95 has loaded.
■
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.