I've followed this guide and everything looks to be correct. I'm using this to restore an old Powerbook Unibody (2008) that was using Yosemite previously. When I go to restore the Powerbook, I get the option to install off the flashdrive and it starts up but after maybe 20-30 seconds the laptop shuts off. All diagnostics for the drive appear to be good. Any thoughts? What am I missing?

This is the guide I followed: How can I use Windows to create an OS X Yosemite USB flash drive installer from the disk image (.dmg) file downloaded from Apple?