How do I disable keyboard check during startup.?

I have an OLD computer with an iwill kk266-r motherboard. I've turned it into an ubuntu LAMP server. It's going to be headless and kept at home while I'm off at school. The problem is, if a keyboard is not detected when booting up, it'll ask you to press f1 to continue. How do I disable this check so I can remotely reboot the machine?