Compaq 267644-001 - Manual (Page 32)

Problems and Solutions
Troubleshooting 1–29
A device, for example
the keyboard or mouse,
connected through the
USB connector does
not work before the
operating system loads. USB legacy support is
disabled. To enable USB legacy
support, refer to the
Software Guide on this
CD for Computer Setup
information.
USB Problems (Continued)
Problem Possible Cause Solution