I recently did an upgrade to add additional SSD to iMac 27' mid 2010, with all the official cables, bracket, etc. everthing worked great. but now 1 day later i discovered that my 16GB show up as 8GB! after testing every memory slot separately - turns out Upper right memory slot now cant read any RAM (Ram is fine in all other slots). When i start mac with any memory in this slot alone - the screen is black and its a beep with a long pause, then a beep again (having 2 RAM modules in upper row - same thing).. I know the slot was working before - since I tried 16GB before SSD upgrade. So with all 4 memories it shows up as 8GB. when i remove RAM from this upper right slot - 12GB get registered from the remaining 3 slots. After removal of logic board I think, i've heard a tiny loose part and found that loose "connector". I just kept it. Now I have all the reasons to believe that this connector caused this 1 memory slot to be not working. Anybody recognizes what could that be? if you could mark on these photos of logic board where to pay a very close attention (obviously somewhere in memory slots). http://guide-images.ifixit.net/igi/ktLKDUFPyGmyPPQJ http://guide-images.ifixit.net/igi/g1q3TMAZD1skKwhG Thank you.