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It makes sense that if this Ethernet Power Save turns off the network connection that you wouldn't be able to wake it up over the network. I've turned off this setting and several hours later I'm still able to connect to the web interface and it shows the printer status as in sleep mode. In the network options there was a setting for Ethernet Power Save that was On. I think I finally found the setting that fixed it. This was the final bit where the tech support guy gave up and basically said it would need to print every 60 minutes to avoid needing to wake it up with a button.
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When it was asleep, you couldn't print to it, you couldn't access the web interface, and you couldn't even ping it. The printer appeared offline and you needed to physically press a button on the printer to wake it up. When the printer went to sleep after 5 minutes (default setting) it wouldn't automatically wake up when you sent a print job. Install was easy and the client loved the print quality. Yesterday I installed a new CLP-415NW printer for a client.
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