Your topic is/was - "How to turn on p8p67 after power loss"
To Wake it there are a variiety of options, and they're listed in the 'APM' section of your manual; see pages 3-21, 3-22.
The most common Wake other than Mouse/Keyboard/Power Loss is 'WOL'.
WOL depends on the LAN used, it's location to the PCI/PCIe, and the Event signaling:
Realtek PXE OPROM -> Enabled
Intel PXE OPROM -> Enabled ; some ASUS with Intel LAN
Wake On by PCI -> Enabled
The P8P67 uses Realtek LAN -http://www.asus.com/Motherboards/Intel_Socket_1155/P8P67/#specifications
Manageability WfM 2.0,DMI 2.0,WOL by PME,WOR by PME,PXE
PME - http://en.wikipedia.org/wiki/Wake-on-LAN
Waking is normally from WOL by PME with a 'Magic Packet' and WOL also Enabled in the OS.