I currently have an ePrint-enabled OfficeJet Pro 8600 that I set up with a static IP address. Yes, it is ePrint configured because I can print off the sheet with the e-mail address. It is also configured in Google Cloud Print because it shows up there.
The printer is connected to my network via Ethernet, so it is not dependent on any PC's USB connection. However, I cannot print to it when I'm not at home unless my main PC is turned on. If my PC is turned off (which is usually is when I'm not at home), the printer shows up in Google Cloud Print as offine. This makes absolutely no sense to me because the printer is connected via an Ethernet cable, not USB, and it is already set up for ePrint/Cloud Print! Why does my main PC have to be turned on in order to utilize Cloud Print?