Keyboard not responding before boot

Hi,
My USB keyboard does not respond at all before the OS boots. This means that I cannot access the bios, not can I chose which OS to boot in Grub (it is set to automatically boot in Archlinux with a timeout of 5 seconds). But my keyboard works fine after boot, as I'm using it now...
This behavior only started about three months ago; before that there was no problem. It seems like the USB-function is disabled in the BIOS, but since I cannot access the BIOS I cannot verify or change this. And I cannot attach an old PS2 keyboard, because the computer (Dell Dimension C521) has no PS2 port, only USB.
I have the suspicion that the computer is too old and that something hardware-ish started to malfunction. But perhaps someone here has an idea how to fix this?
Thanks,
Roger

lifeafter2am wrote:
karol wrote:
Do you have 'usbinput' hook in your /etc/mkinitcpio.conf?
https://wiki.archlinux.org/index.php/Mkinitcpio#HOOKS
Adds USB HID modules to the image. Use this if you have an USB keyboard and need it in early userspace (either for entering encryption passphrases or for failsafe mode).
If he's not getting access to the keyboard in the BIOS / Grub screen; then it has nothing to do with a kernel module that is loaded after that.
Argh, you're right + the usbinput is now included by default http://mailman.archlinux.org/pipermail/ … 01116.html

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[edited 2009-12-30] deleted extra words in subject line
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Keyboard not responding before boot

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