Hi, I need some help with my DIR-850L router. It was working fine last night but suddenly it stopped working. I tried to fix it by doing the set-up again but it did not fix it.Jan 26, 2017 · All the lights on the front could also be solid and illuminated. Or the light indicating the router’s connection to your DSL or cable modem just keeps blinking, and blinking, and … . Suggestions: Power-cycle your router by unplugging it, waiting 30 seconds, and plugging it back in. You can also try a hard reset — most routers come with a tiny button that, when held in for four to seven seconds, resets the device to its factory default settings.