First, you need to enable keyboard wakeup jumper on board. Jumper is JPWAKE and located near the PS/2 mouse and keyboard connectors. The default setting for this jumper is 1-2 (disable), move the header to 2-3 (enable). Second, go into BIOS setup and set "POWER ON fuction" to either "Any key", "Password", or "Hot key" depending on your choice. Save and exit the BIOS. From then on, you can power on the system using keyboard.