My time capsule is disappearing from my Finder list (left side) occasionally.. it is very odd. I have my iMac plugged in to it via Ethernet cable. How do I force my iMac to connect to it when it misbehaves like this?
If it's connected via Ethernet the most likely cause is the drive has fallen asleep and your system has lost its connection with the drive. The remedy: open the drive about once every two or three hours to keep it awake.