All 5 LED's were green. I had internet connection on the iMAC. It's all the other devices that didn't have internet connection.

@Kevin_Z HI Kevin, I had drop out issues on my old single band Belkin router when many devices were connected to it over wifi at the same. So my ISP suggested upgrading my router to a dual band...

Same issue here, "no internet access" on most of the devices. I bought a new router yesterday - Archer C6. Installed it and connected all my devices to it. They all worked fine the whole day. I shut...