Haven't seen a thread, like the ones over at the other forum, so figured I might as well get it rolling. About 30 minutes ago, decided to see if I could get my MacBook back up to 12GB RAM. A few days ago, I made the mistake of letting my phone drop onto the palmrest between the keyboard and the trackpad. Immediately, the computer froze with garbage on the screen, and three tones being played every five seconds. Shut it down. Tried booting again. Dark screen, same tones. Googled it, and realized that it was a RAM problem. Pulled the 4GB stick. Problem remained. Pulled the 8GB stick, and reinstalled the 4GB stick. Success. Back up and running, but with only 4GB of RAM. Reached out to a friend who had a spare 8GB stick. Picked it up from him yesterday. Finally got around to it this evening. Installed his stick, problem reappeared. On a whim, I decided to pull the 4GB stick, and install his 8GB stick alone. Computer booted. Shut it down, and figured, "heck, let's see what happens if I reinstall the other 8GB stick that I pulled originally." Put that one in. Computer booted up without problems. So, I'm now back to a full 16GB of RAM, like what the computer had before I picked up the problem child mid-2012 MBP last summer.
