How is it that when in BIOS, and USB is not yet active, I can make changes using the USB keyboard?
You are using USB in DOS mode
The BIOS provides USB support independent of an operating system. Mine even recognises a Bluetooth USB connection.
So, although there is no power to the USB (the mouse LED is not lit), it can still communicate?
There is power to the USB socket even when PC is switched off.
But not enough to light my keyboard and mouse?
Perhaps my statement above above is motherboard dependant.Some motherboards power the USB ports from the 5V standby rail on the PSU (the one that stays on when the rest of the PSU is shut down).
BIOS is Active from Switching the PC on, and BIOS is why the USB keyboard works. Look in BIOS page for USB You will see what activates it, If you disable USB you will need a PS/2 keyboard to reactivate it
Thanks. The reason for my interest in this is my new all singing all dancing computer is sometimes reluctant to activate the USB keyboard and mouse when I awake from Sleep (it's Vista).
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