Hello Edward Hild,
It is very possible this is a compatibility issue with this specific device. I am afraid to tell there is not much that can be done in these cases. Here are our recommendations:
- Test a different device on the USB ports to ensure they are working fine.
- Remove/ re-install the device drivers from device manager.
- Make sure you have the latest drivers for the device.
Thanks for taking the time to reply, but the drivers can't be the issue: the problem occurs during POST before even the boot loader runs. If the BIOS setup were running, I might believe it checked for a HID device and got confused, since it isn't really a mouse and certainly isn't a keyboard, but BIOS setup isn't running either. I have a USB keyboard and mouse attached and they have no problem.
Does the POST code check current draw from USB ports? I want to check load current on the Space Navigator, but I need to hack a bit of hardware and haven't got around to it. If the Space Navigator draws too much current at startup, it might violate the USB spec. Could be a bad unit or marginal design. If the BIOS isn't reading current properly (bad code? wrong current sense resistor?) that would account for it too.