So I've been using my older, AA-battery-operated Apple Wireless Keyboard with my MacBook Pro with no issues for years now. Today I came back from a trip, in which I brought my MacBook with me, but not my wireless keyboard or mouse. Now my mouse reconnected instantly, however my keyboard did not. When I tried to type, a green light started blinking slowly on the keyboard and my MacBook could not connect to it. The green light does not stop blinking unless I remove the batteries. I've tried removing and replacing the batteries, new batteries, holding down the power button for x-amount of seconds/minutes, un-pairing and attempting to re-pair the keyboard, trying in safe mode, and trying to connect on different users and devices. Nothing will allow the keyboard to connect again. Apple Support told me that the only recommendation they had was to take it to an Apple Store for troubleshooting. I'd rather not drive all the way out to my nearest Apple Store if I can help it, so I figured I'd ask for any tips here first. Thanks in advance!