Issue with Wifi connectivity

There is a problem with the power supply or less likely, the wireless radio on the AirPort Base Station. This is quite common on base stations that are 2+ years old.

About all that you can do at this point is reset the base station back to factory default settings, and then set it up again to see if that will help. If the disconnects continue, they will start to occur more and more often, and the base station will need to be replaced.

If you have a Mac that is currently covered by AppleCare, the base station is usually included in that coverage for up to 3 years from the purchase date of the AirPort base station. Get with Apple Support for details, to see if your AriPort is covered and will be replaced at no charge.

I've had the same behavior since upgrading to 7.7.9 / 7.6.9. Oddly I've got two devices that can connect when this happens, but everything else (including another airport that is bridging to it) fails to connect. This is a firmware issue in my opinion, and nothing to do with hardware.

Have downgraded to see if that fixes it (FYI, to downgrade, Option-click the version number of the Airport device to reveal a drop down).

I've just waited 24 hours after doing a factory reset and recreating all the settings on my Airport Extreme. In my case the 2.4Ghz went offline (visible but not accepting connections) while the 5Ghz was fine. WiFi (both frequencies) is now working without any issues. You are indeed correct, this has nothing to do with the firmware, but mine started acting up the same day I did an upgrade.

Liniumz has not made any changes to the firmware on his AirPort....according to his post....so this would not likely be a firmware issue, would it?