Chosen Solution
Hi folks, So I have 2x4gb ram sticks with the most updated EFI for my Macbook 5,1. Put both sticks in and my system information says only 4gb recognized. Removed one stick and tried on both RAM ports. The top port works fine, the bottom port doesn’t work and the system won’t start and beeps once every few seconds. Has anyone encountered this problem and does anyone have any suggestions as to how to fix it? Cheers!
Hey there Nik. Sounds like a bad ram slot. It’s made out of many pins, you can look into the slot and make sure the pins are aligned correctly and not bent. I’ve fixed a few just by bending the pins back. There is also an IC chip on the motherboard that may not be working properly. We’ve repaired issues like this as well. Gonzalo -CleverTech
I have a similar problem however it’s a bit strange. I have an iMac mid 2011 i5 For a period of time I had 2 ram X 2GB and 2 ram X 4GB a total of 12MB Recently the slots of the 2 rams of 2GB appear empty. Ok… I bought another 2X4GB to replace them and to upgrade the total memory in 16GB I put the new couple but again only the 2 already installed chips regognised (the down couple- bank 0 and 1 in Dimm 1) The upper part (Bank 0 and 1 in Dimm 0 appear empty) First thought were that the ports had an issue as described in the thread. Of course I have checked all chips individually and all are ok. The strange part is that the upper slots WORK normally and recognise the chips IF the down slots are empty. If ALL slots have a chip inside, only the down couple of chips (Bank 0 and 1 in Dimm1) is recognised. So, neither the chips have an issue nor the slots…individually. I will appreciate any idea!
