P4T/P4T-E: USB Keyboard not recognized until XP booted



I've got a couple P4T/P4T-E systems that do not respond to a USB
keyboard until XP boots up. Pressing DEL during BIOS init will not
work, of course (though I can do that by plugging in a PS2 keyboard).

And since they are dual boot systems, the prompt for which OS just
stays onscreen until it times out and selects the default OS.

Any ideas?
.



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