I have an Arris 862G modem/router from Comcast, and have recently been giving static IPs to various devices in my home network. However, after assigning a static IP to one of them (a Surface RT, if that matters), the "Connected Devices" page of the router (after logging into the default gateway in a browser) almost always gives a "No Data Received" error, or simply shows up as a completely blank page. This happens with or without the Surface on. All other pages in the router work perfectly fine. It seems that a lot of other people have had a similar issue with this router, and Comcast has not been helpful.
Does anyone know why this is doing it or how to fix it? Can I fix it without a factory reset, or is that necessary?
And yes, I tried restarting it. Nothing changed.
EDIT: Turning on and then turning off one of the other devices (an HP G72 laptop) made it work again, but then it just stopped after a while. Further tests with various machines show that connecting/disconnecting something "fixes" it, and then it randomly stops later after another change.
EDIT again: Now nothing seems to be able to make it work again.