Hi guys, Wednesday my iMac would not boot, it didn't give any activity when I pressed the power button. So I took it to the Apple Store... 2 days later they called to say that they had to replace a motherboard. I went to the Apple Store to get my iMac back. Plugged it back in, everything seemed okay, except that it acted alot slower. Checked my specs... Instead of 4GB RAM on my i7 I only have 2GB RAM anymore. The whole motherboard was replaced, but does that mean they also replaced the RAM? (sorry i'm not very good at hardware)... So at the moment, I have only 2GB RAM, and it's not that it's not being detected, my Mac IS actually slower... What can I do? I guess i'll have to go back to the store? Or do I have to open up the case to check if there really is 4GB inside? Please help me! I'm so confused! Thank alot! Navigator98 EDIT: just for the info, it's a late-2009 iMac 27" with Intel i7 2.8GHz and normally 4GB RAM!!!