Compaq M300 manual Solving USB Problems, 15-25

15-25

Solving USB Problems

Solving USB Problems

Problem

External device connected to the USB connector does not work.

Possible Cause

The computer is running Windows NT 4.0.

Solution

When the computer is running Windows NT 4.0, 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.

External device connected to the USB connector does not work during startup (before Windows 95 or Windows 98 loads).

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.

Use the external device only after Windows 95 or Windows 98 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.

A New Hardware Found message displays although the external device was previously recognized.

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.
	Continued