So i got this from my brother, i wanted to use it in my home to expand network, i plug in wan from my main modem, plug in my pc into lan 1 port, everything was fine since a few days ago, the router wont recognize that wan port is in use, but it lights up planet light, and for some reason lan 2 and lan 3 start to blink too, and yes i dont have internet connection, i log into main modem, the modem dosent see this tp link router as connected device, any help? (I tryed to update firmware and it didn't help, tryed everything that i found here on forums, but nothing helps) By the way, sometimes when i power cycle this router, it would get connection for some time, untill lan 2 and lan 3 lights turn on