When this is happening with different routers and all other devices work with said routers, this a Surface problem not a router problem. Bug MS, not your router manufacturer.
I am on my 2nd Surface (first one had the magnet issue), this one has some slight flashlighting at the bottom of the screen. I have only noticed it during boot, never during normal use. Annoying but I guess I can live with it.
I had a problem with the magnets falling out of the bottom of the tablet the day after I brought it home. I was in a chat with support, they said it was serious and that someone would call me within 72hrs. Before I ended that chat they said it was serious enough that someone would call within...