R510 WAP is not working. It’s stuck in after few hours of working. Green turn to red light. Clears up after resetting. I have two units, one located on the first floor and second one is upstairs(slave unit). My slave is working fine. My switch box and other devices such as modem and router from the service provider is located upstairs,fyi. My slave was replaced two months ago and it appears to working so far.