Boot without a keyboard on old HP

[CntrlAltDel]

Hi everyone. I'm basically looking to boot my old HP Compaq Evo D500 Small Form Factor Pentium 4 without a keyboard, I'm using this PC as a networking device to another system via an ethernet cable. It works fine after the PC is fully booted, I just have to disconnect the keyboard after the PC has fully booted. I've read quite a few threads here on Tomshardware about booting without a keyboard and most of them say I need to check with the bios. I did just that, but these BIOS settings are foreign to me. If anyone can suggest a way I can some how disable keyboard check, I would greatly appreciate it.

 

[PhilFrisbie]

If it is possible, it will be in the BIOS.