Grab an arduino Leonardo, micro, or any board that supports USB HID emulation. Throw on a simple IR receiver module and set it up to send a keypress when the power code comes through.
You might have to explicitly enable "allow this device to wake computer" in device manager.
As far as I'm aware, there's no special sauce here. Your motherboard should support leaving USB ports on and allowing wake from USB HID devices. I don't know of any consumer board from the modern era that doesn't support it.
Beyond that, you could just throw a relay across the power switch pins. Plenty of ways to skin this cat
You might have to explicitly enable "allow this device to wake computer" in device manager.
As far as I'm aware, there's no special sauce here. Your motherboard should support leaving USB ports on and allowing wake from USB HID devices. I don't know of any consumer board from the modern era that doesn't support it.
Beyond that, you could just throw a relay across the power switch pins. Plenty of ways to skin this cat