For example if your MacBook Pro has a total of 4GB of RAM, you have two memory modules of 2GB each. Therefore shifting the memory into the functioning slot and leaving the failing slot empty is a workaround that keeps the laptop running without a costly logic board replacement. Luckily though, usually only one of the slots fails. Unfortunately the memory slots cannot be replaced without replacing the entire logic board. This is why the MacBook Pro randomly crashes when the palm rests or presses more firmly in this area, especially if the upper of the two slots has failed. The slots sit directly beneath the casing by the left side of the trackpad. There are two slots for the memory shown below. However, I have seen the random crashes, shutdowns and beeping persist in 2012 MacBook Pro 13″ laptops even after the RAM has been replaced. What I’ve found to be the culprit is not the memory modules, but the trays or slots where the memory modules are held. If your Mac laptop begins to behave strangely after the memory has been upgraded, the memory modules themselves are usually the problem. Mac laptops are very particular about the type of memory they will accept. The first and most logical conclusion is that the RAM or memory modules are acting up.
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