While it is beyond the skill level of most people, the RAM slots can be replaced. Unfortunately if you want to have both RAM slots available, you will need to have this repair done and you don't want to replace the motherboard. The average person is better off running a single large memory module, since the repairs that are required to fix the board are very difficult. The downside to this is you can run half of the memory you could before, but it's the easy fix to deal with a bad RAM slot.
Before you replace the RAM socket, check if the northbridge has an issue and use a completely different set of memory. If this works, both memory modules likely have a problem and replacing the memory was enough to clear up the problem. In most cases, the problem lies with the RAM instead of the socket or chipsets.
However, if it is a bad northbridge, then you will need to decide if it is worthwhile to have the chipset replaced. It most likely will not be and you'll be better off using the machine with one RAM slot for the rest of it's life or selling it for parts.
If you have tested both of these components and find notheing wrong, it's a memory socket problem. The difficulty of sourcing the part and doing the repair depends on which socket is bad but the top slot is much harder to replace then the bottom slot. You also won't be able to find sockets that use the Apple OEM color, since Apple doesn't like 3rd parties being able to repair their stuff. You will also lose the serial number sticker on the board if the top slot is bad if is is not transferred or it is burned, so try to keep it intact if possible. It's best to remove this and put it on wax paper to preserve it.
In terms of sourcing the part, this machine uses a uncommon socket style. You're going to have a harder time finding the correct part but it's not impossible. The only thing that's special about the bottom slot is the plastic is black. It's not important to match this, so it's okay to get a socket that uses the wrong color plastic.
Since the top slot is so sensitive and easy to damage, it is absolutely imperative a quality hot air station is used to avoid damage. Do not use a cheap station since the odds of damage are much higher. It is also a good idea to use a lot of flux to make the solder flow quickly and minimize the heat exposure to the sockets.
If you have not performed such a repair and want to try, spend some time seing which technique works the best and offers the least amount of risk to the top RAM slot on the board. If you determine the job is above your skill level, don't mess with the board and send it to someone who can do the job correctly.
If you're able to repair the board, here's a link to the guide to remove the motherboard: MacBook Pro 13" Unibody Mid 2010 Logic Board Replacement
Thanks for the details. Now all of a sudden all of it is working fine. There is only 1 2gb RAM in one of the slot. The USB issue and the shut down issue has vanished. I tried installing the other 2GB RAM in the BAD SLOT. I again got 3 beeps. I wanna know if I can install one 4GB RAM in one of the GOOD SLOT and leave the upper Slot (BAD SLOT) empty. Will my MAC work fine ? I asked for the Logic Board replacement. Its gonna cost more than half the price of new Mac Pro to me. So thats out of question. Its been a year and a half and i dont intend to buy a new mac so soon. Please suggest something to resolve this issue permanently.
by Deep Bhagat
Similar problem with my mac pro mid 2012 13inch. On October17- 2014 I took my mac to the store and the guy told the ram slots are broken and logic board must be replaced. Since its gonna cost me a fortune I have decided to sell the spares for some bugs and listed it on couple of websites. Before handing it over to a guy I switched it on and to be surprised it started working fine, as usual and perfect. To make sure I restarted the mac but sadly the mac won't turn on and started making the beeps sound. Since u had a similar kind of problem I request you to guide me in the right way. Thanks in advance
by Sudhakara Kasu
Wedge both sticks of ram in their slots with a shim in-between the ram and the battery housing. Next, get two pieces of spacer (I used a thin gauged bamboo knitting needle cut into two pieces no longer than the width of outside edges of the ram slot carriage.) Your spacers need to be non conductive, they need to be thicker than the rim of the ram carriage from board to top of carriage, but not so thick that they cause your back panel to warp.
Lay one spacer right on the logic board parallel to the rear side of the ram carriage, and the other on the board perpendicular to the first. Don't lay them on any component/capacitors, You'll have room. They do need to be thick enough to be held in place when you put the back cover on. With out disturbing their arrangement, place the back cover on, put screws back in place, turn on.
No matter where you push on the back plate at this point, the ram carriage as well as the wedges used to keep the ram in place will be protected from any kind of pressure.
by James Searcy
Buy a new memory card, with twice the memory. Install one. You will recover your original function, at a cost of under $100. Beats spending $700 on a logic board.
by Theodore Frimet
I cut one plastic bar that same size with RAM, i insert it between two RAM. After all well done
by Duy Huynh
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