Lower RAM slot working with only one RAM chip
I recently got a mid-2010 MBP. It has the usual three beeps on startup indicating a RAM issue. The previous owner had bought two additional RAM chips, but this didn’t fix the problem. So I got 4 RAM chips in total.
After trying different things, I’ve found out that all the chips work in the top slot (as in “it starts booting”), but only one of the chips works in the bottom slot.
Not sure what to make of this. I would understand if none of the chips worked on the bottom slot, but this one does, consistently. My best guess is that it might be a slightly bent contact on the slot, with which this one RAM chip happens to make good contact?
How would you go about diagnosing and fixing this?
Esta é uma boa pergunta?