Tried again, cursor quit, I rapped the back of the MBP lightly and it came back to life. I found that the cursor will stop moving as the failure begins, right be before beeps or shutdown. I sat down on couch, the moment I put MBP on my knees, it quit. What did i do? Got a 1.5mm (.60 cal) piece of flat styrene about 3mm wide and 7 or 8 mm tall, put BOTH RAM sticks in place and with a little plastic tip/spudger push down the stick closest to the keyboard so the clip can make its full travel inward and insert the styrene pieces one in each side in the slots between the clip and where the screws for the bracket are and then push them towards the RAM contacts to make pressure inward so the clips are pressed firmly against the sticks (you wont be able to remove the sticks without removing this styrene pieces). It seem the CLIPS that hold the stick closest to the keyboard are worn and do not have enough pressure so they do not hold the ram in place all the time, a little bump and the RAM stick springs up like half a milimeter and the problem appears. apparently, as i said, and for everyones happines it migh not be the soldering at all!! So I took it apart again, and what did i find. I'm having exactly the same problem as this.
I've been reading forums about this problem and after watching this video I have a MBP 15" early 2011, had the logic board replaced in the apple program for the video chip, after that, i started to get kernel errors once in a while, all was pointing to RAM, but could never actually find a defective stick and tried many, after a while of seating and reseating the sticks and a fresh install os the macOs it stopped for almost a year with no problems i thought i was done only to begin crashing, powering off and beeping this week. everyone, after having this problem, i found out the problem might not be the soldering at all. The screen pictured on this discussion is exactly what I saw on the B machine. I'm at a total loss Apple Support was useless It does not appear to be heat related nor virus related. On all of the the problem has been intermittent, the machines will run fine for a day or a couple of weeks and then start beeping three times on start up. This does not appear to be a RAM error on any of the three machines.
Since this original machine came in I have the same problem on two more machines:Ī: MBP 15" 2012 2.6 GHz running 10.12.5 500 GB SSD & new HD cableī: MBP 13" 2012 2.9 GHz i7 running 10.9.5 My MacBook don't turn on, only get Beep every 5 sec interval I see we got another question on this type of error today. I'm wondering if this is possibly connected to the GPU issues on this program: 7/14/17 No history on the machine as it was an eBay buy. RAM error right? Pulled RAM, went with know good RAM. Got this machine in and it beeps three times and three front led flashes when the power button is pressed.
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