Is the top socket likely to suddenly become faulty? I have some WD-40 Fast Drying Contact cleaner but I didn't to start spraying that around without checking.Īm I best to just order a compatible 4gb single ram and run it in the bottom slot or take it to a local computer repair shop? It's second hand and 2 yrs old. I am assuming from this the top socket has suddenly become faulty. Yes Reconnect user’s optical drive cable. Verify if media is now recognized and reads reliably. Disconnect optical drive by lifting optical drive cable at logic board and connecting a known-good drive. RAM: 8 GB (max upgrade) Nvidia GeForce 9400 Integrated, VRAM: 256 MB. Settings > System > Power and Sleep > Additional force settings. MacBook Pro 5,5 13' Mid-2009 MB991LL/A - A1278. After some google searches I found that it is caused by either a) bad RAM or b) the RAM is inserted. Then the screen froze and the computer started beeping. Started up just fine and ran great for about 10 minutes.

I then tried to start up with RAM in only the top socket, it then beeped 3 times. MacBook Pro (17-inch, Mid 2010) Symptom Charts Mass Storage 99 3. When a computer fan spins loudly for a long period of time. I just upgraded the RAM in my MacBook Pro (15' 2 GHz Intel Core i7 - early 2011 model) from two 2gb modules to two 4gb modules. I took out the top 2GB ram and it turned on, I then swapped the 2nd RAM with the 1st in the bottom socket and it started up again. I removed and reset the Ram but still 3 beeps. Yesterday when I went to turn it on it started beeping 3 times, so after scanning this board I realised it was an issue with the RAM.

2009 macbook pro 3 beeps after idle