Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
I don't have a good answer for you, but my Roku 3 does something similar with its wired connection. When I reboot it will say it's not connected to the network, but it clearly is. I can even telnet to it. I have to go through the network setup every time, but unlike you I get the green check marks. There's clearly something flakey with the Roku 3's wired connection.
So if you set it up with the wireless connection, everything is fine? What happens when you then switch the network connection to wired? Is that when you see the 13.50 error or does it only happen when you reboot? I'd give another Ethernet cable a shot even though it works with something else. Another thing I'd try is to use the wired MAC address (found in Settings->System->About) to set up a DHCP reservation in your router. Over the years I've noticed Rokus are much more happy if the router isn't trying to give them a different IP address every time they reboot. Just make sure to reboot everything after you make any changes.
It would be nice if Roku documented exactly what these error codes mean.
I have done more testing. I got hold of a long hdmi cable so l could try with a short ethernet cable l had as my router is the other side of the room. The roku 3 instantly connected via ethernet. I then got a ethernet cable tester and checked my original cable and as expected it checked out ok.
Unfortunately I am still no closer to getting it to connect with the 4 meter long cable.
It seems to be some sort of attenuation effect but the Roku 3 worked before with that cable.