12-09-2010, 02:01 PM
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).