I had the same problem of not being able to access the BiOS thru the ICS splash page, and the power button method worked for me - after a few one thousand and one tries.:-) So I guess what I want to know, is the splash page a part of the BIOS ? ...and needs to be fixed so my USB wireless Logitech K400r can access it ? I'm running Win 10, with the FCBYT10H.86a BIOS. Also, I'm a newbie to the forums and wonder if this is how to ask INTEL to fix the problem, or is there a more direct approach? Thanks for letting me know there is a "work around".
The splash screen is part of the BIOS and it is shown when the device is doing the POST, which is the verification that the computers do in order to check the status of the hardware on your system, so while you wait for that you see that splash screen.
Now, in regards of the USB issue that you have we recommend to use wired USB keyboards because the signal that comes from the keyboard to the unifying receiver may be distorted or may not be reached to get in to the BIOS. If the keyboard works within Windows we can discard the possibility of a USB port failure. Also if you are using a USB hub you can test on different ports or having the unifying receiver connected directly to the Compute Stick and try to access to the BIOS.
Please let me know if your issue persists.
I have tried all the suggested remedies you offered, except the wired keyboard, as I no longer own one. Moving the unifying receiver to different ports on the USB hub, and using it directly in the ICS USB port made no difference. The wireless keyboard seems to not be recognized by the ICS stick until after post, at the splash screen, where any key will bring up the sign in page. Is this something that can be fixed by a change in the BIOs?