Hi,
I have an NVIDIA Shield TV which is connected to a PC in a separate room holding all my media. I currently use my Nexus 6P to remotely turn it on and off but would love to be able to do this from my TV remote.
Can I do this from within Kodi? Or anything means?
Checking out the Wake on LAN addon might be a good place to start, although whether your computer can accept a wake command depends on the hardware & BIOS.