I am using an old Lenovo ThinkCentre 7099 as an HTPC. This is a desktop PC. I am trying to switch AC power to an external amplifier by using the 5 volt power from a USB port. I am hoping to have the port be the "signal" to power a relay only when the PC is awake. I've looked at the Device manager but not sure if this motherboard will support this. Ideally I would only power off one USB port so I can keep the wake function for my USB keyboard. However any 5 volt source that will be off for sleep could work.