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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. Hey everyone, after having this problem, i found out the problem might not be the soldering at all. With this place holders no freeze, no reboot. If you shake or bang your MacBook Pro or just type on the keyboard, the RAM bracket holder will not loose contact to the modules. Put it between the RAM bracket holder and the logic board to help press up and a strip on the holder so the cover presses down. I solved this problem with a short strip of an old credit card. Option 2: If you want to use both slots (instead of only one - either top or bottom), you can try to put some distance between RAM bracket holder and top case. Option 1: you can use only one slot (the top one usually). Re-soldering the bottom side of the RAM bracket holder is quite a challenge and often you will need to replace the whole mainboard (>400 USD !!!). This leads to freezes, reboots, stripes and display errors. (Not going to replace the logic board for this problem)Ĭan anyone help, or has anyone had the same problems?Īt this model the RAM bracket holder often looses contact with the bottom side on the logic board (side you can not inspect without dismounting the mainboard). Really would like the bottom slot to work as well, feels like i am out of options.

So I turned the system off, put the 8GB stick in the top slot and now working fine with 1 8GB slot. This time it booted, with black stripes flashing in the screen and the boot taking a very long time while the load bar was not progressing (hope this makes sense to read). Pretty much tried everything after that, SMC reset, PRAM reset, loosening screws of RAM-bracket.Īfter that I tried to put 1 RAM stick back in the bottom slot, and tried to boot. Put the 8GB RAM back in the top slot, system boots normally with 8GB of RAM. Put the old RAM back in the bottom slot, same problem. No beeps, black screen, just 3 flashing/blinking lights at the LED indicator, with a 1 second pause in between the 3 flashes. I bought myself 2x 8GB of RAM (Corsair Vengeance 1600Mhz DDR-3)Īfter putting in both sticks the macbook didn't start. I got the system with 1 4GB RAM stick installed (in the top-slot) and the other slot being empty. I bought a used MPB 13'' Mid 2012 this week.