after installing yosemite, my airport time capsule stopped working
After I installed Yosemite to my iMac, my Airport Time capsule disconnects at random intervals. Restarting the Mac will often get it to reconnect, but sometimes it won't. We have not had any issues with any other of our 12 peripherals (including iPhones) connected to the Airport, just the iMac, and just after we installed Yosemite. I have even tried a wired connection. Same story. It works for several hours, maybe even a day, and then all of a sudden it stops.
When I go to the Airport utility, a wireless connection finds nothing. If I connect via Ethernet, it displays a grayed out icon of the Airport Time Capsule, that says "device not found" when you click on it.
Tech specs: 27" Late 2012 iMac with 3TB AirPort Time Capsule 802.11ac
iMac (27-inch, Late 2012), Mac OS X (10.7.5)