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no keyboard power when restarting

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by maynard6900

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I recently built a new computer. I used the USB keyboard from my old computer. When I restart the computer or turn it on, the keyboard won't work until I unplug it and plug it back in. It does this in BIOS as well. It only works when the computer isdoing a memory check (I can select setup). Once I get into BIOS or try to log onto Windows, I have to unplug it and plug it in again to work. I checked the drivers and everything seems to be in order. I am running Windows XP. Help!

3 replies

by thechas

Sounds like either a bug in the motherboards BIOS, or a problem with the BIOS settings.

Make sure that USB legacy keyboard support is enabled in BIOS settings.

Check with the motherboard mfg for BIOS updates that address USB keyboard issues.
It is very possible that the system reset pulse is too narrow to reset the keyboard controller on your particular keyboard.

When you un-plug, and plug in the keyboard, you are effectively forcing a hard reset on the keyboard controller.

Another thing to check is whether or not the USB power cycles when you boot the PC.
If not, there may be a BIOS setting that needs to be changed to force the USB ports to reset on a re-boot.
You might need to disable any wake-on settings that involve the USB ports.

Chas

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