One Ram slot gone Bad..

I have a Macbook Pro 13 inch, Bought in December 2010, Its out of warranty and no Apple protection Plan.

I opened up the lid, and it started making beep sounds. I read on mac rumors that its ram issue. I removed the RAM from the upper slot and tried. Its working on 2GB ram on the lower slot. But it shuts down itself when ever i put it on sleep/closing the lid. And pen drives or other USB devices are not working. The become visible and then vanish with warning saying. The device wasnt ejected safely.

Can anyone help me with the issue?

Can i install higher RAM in the working slot and expect normal functionality. Please Help.

Thanks

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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.

Thank You

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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

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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.

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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.

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If you want, you can consider the failed socket dead and get a single stick of RAM for the system. If you want to use 2 sticks again, you will need to replace the RAM socket.

Before you even attempt a RAM socket replacement, check the northrbridge for a failure, and try using known good RAM. If you continue having problems with known good RAM and the memory controller is good, you have a bad slot. If it's a bad northbridge, then you will need to decide if the cost of getting a new chip installed is worth it or it's better to scrap the machine and sell it for parts.

Since you know the memory controller is good and using known good RAM still did not work, it's safe to assume the memory slot is bad. If the top slot is bad, the part will be hard to source (it looks like it's Apple specific or a uncommon slot type). You can find it, but it's not easy. If the bottom slot is bad, the part should not be hard to find since it's just a standard slot that the vast majority of systems use.

IMPORTANT: The top RAM slot with the serial number is easily damaged if too much heat is used. If you do not shield it off well or use too much heat, you are very likely to damage it during the repair. You should only use a hot air station with good temperature control for this job. THIS IS AN ADVANCED REPAIR.

The key to avoid damaging the top slot is to use a good amount of flux to avoid having to as much heat, as well as a good hot air station. You absolutely do not want to use a cheap hot air station, as this increases the chance of top slot damage.

Spend many hours studying what techniques damage the top RAM slot so you know what to not do. Once you do that, study what techniques work the best. If you get nervous at any point, you will probably get the repair wrong. Send the board to a shop who can do the repair for you at this point.

If you are comfortable doing the repair or are willing to risk damaging the top RAM slot, here is a link to the guide on how to remove the motherboard, so you can do the repair. MacBook Pro 13" Unibody Mid 2010 Logic Board Replacement

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I had the same problem a couple of days ago.

So I cleaned the dead slot with an eraser, and than removed the erase dust with a regular brush and after I used a mechanic pencil to put grafit on the slot so it would be more conductive.

My Macbook finaly turned on with the 2 slots working.

I still need to wait for a few days to be sure that the problem will not come back, but than I just have to try the same procedure.

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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

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Sounds like you have a bigger problem than just a bad SIMM socket.

You state the system doesn't go to sleep when you close the lid or access the menu Sleep instead it abruptly shuts down. The fact your USB devices are burping because the system shutdown incorrectly is to be expected.

The first question I have does the system react the same way when you don't have the USB devices connected? If so the system has another problem that is tied into your memory issue. If the system does not shutdown incorrectly then your USB hub and/or one of the USB devices has a problem as it's drawing do much power.

Question two did you get your system wet or could it have been sat on or twisted? A good clue does it rest on all four feet on a level surface correctly or have a dip in the bottom cover? In either case you may have a short.

Remember Air's are very tight inside and have very little clearance. You may need to open up the system to check things out. Look around the controller chip for water damage or bent cover.

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i'm having a very similar problem with my mid 2012 13inch MBP. It was dropped while in the care of a friend about a year ago and was displaying what i believe are called artifacts on the screen immediately afterwards but was otherwise fine, then if you touched a certain part of the case underside the computer would display artifacts, freeze, and reboot after a few seconds. For awhile just checking to make sure the case screws were tight would be enough to boot without issue but it finally stopped booting all together. I didn't see any obvious damage but now the computer will only boot with the top ram slot empty. if i try to insert ram in the top slot (i've tried several cards) it won't boot and beeps three times. could it be something on the logic board was damaged by the shock it sustained? If so what are the likely culprits and how do i go about repairing them? The local mac specialists in my area are just going to want me to replace the logic board which in that case i might as well buy a new one.

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@dxpwnage - please ask a new question on this as your problem is different, thus the solution may differ.

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Deep - Review this MacBook Pro 13" memory guide on what your options are and the needed specs of the memory modules you'll need.

As to your real issue you should try to figure out why your system was having problems. I still find it hard to believe your socket failed you. It's possible you zapped your memory module when you pulled it out or placed it in (ESD damage).

As to your USB & Shutdown problem I think this is related to your memory slot issue. Can you tell us if you have dropped or damaged your system in some way. Often when you have multiple problems there is a relation between them.

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Have had exactly the same problem with my Macbook 7,1 (Pro 13 inch unibody 2010).

48 hours ago, my MBP stopped booting after a firmware EFI upgrade. Right after the apple logo appeared after booting, a kernel panic was triggered and all further boot processes stopped. So I decided to do a major rehaul, replaced the HDD, took out the optibay for an SSD and upgraded my RAM to 8 GB thinking it might be faulty. The mechanic who helped me also said there was a problem with my hdd sata cable connecting it to the logic board so replaced that too. Last night I had the same problem recurring.

Got sick of it and tried an experiment, removed one (4GB) RAM slot - the one on the top - and tried booting it up again. The MBP works fine so far, but clearly sluggish and the smooth effects/transitions typical of OS X are now jarred.

I have the same question as Deep: Is it healthy running your Mac on just one RAM? Any long term problems? Can it handle SSDs?

Background:''italic text''

A year ago, 15 days after my warranty expired, the MBP gave 3 beeps everytime I switched on the comp and refused to turn on. I took it to the Mac "genius" guys and they said $1050 to replace the logic board, just to be "sure that it's nothing else wrong". I asked them to go fly a kite and instead tried my hand with an idiot in Singapore who said he was a certified Mac mechanic. Paid him $450 and still had no improvement after he kept it with him for 2 months citing "complex" issues. I got sick and tired of it all and threw the Mac in a box, generally cursing my luck and swearing at Mr Jobs.

A year later, a week ago to be precise, I just randomly opened it up and switched it on and it was bloody perfect for 5 days. Nothing went wrong, snappy performance, all apps were fast. Mr Mav was happy. And then when I updated software, came the grey screen of death "You need to restart your computer" kernel panic.

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Similar problem here with a mid-2010 macbook pro 15". Makes my blood boil!

Had the three beeps, kernel panic, screen roll-down telling me the computer needed reboot etc - even completely dead with only the light going on but no other response whatsoever. All this happened at random and in between the computer was running just fine.

Switched the RAM around and it worked!.... for a while...then I ran on just one 2GB ram and tried it in both slots and it was fine for several days - so I figured it was the other RAM that had gone bad. Got two new 2x4GB and tried them - worked fine for 2 days and then I was back at square 1....

Lesson: Before getting new RAM, try both RAMs individually in both slots over 4-5 days and then see if its a faulty RAM or a faulty slot. For me its the lower slot. Running on a 1x4GB in the upper slot now.

So - slots can go bad on a Macbook Pro. Hope this prevents someone else from making a mistake.

Cheers! /J

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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

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My MBP is in the storage now since it wouldn´t turn on eventually.. So, try moving around your RAM and run it as long as it works. Sounds unlikely that both RAM slots are broken, so try your sticks in one at a time. When it´s over it´s over, so don´t put your dollars in a sinking ship.

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Thank you very much

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McGyver repair

Situation:

My problem was getting random freezes, artifacts and failed start-ups with the three bleeps. I thought i had traced the problem to one of the RAM sticks (16gb upgradekit), got a new stick from RMA and it had problems immediately (yes i crossed checked, including an extended system diagnose).

On to the repair:

Macbook was pretty clean, no dust in the slots. Used a compresses air, no luck. Thought of using the ol' contact cleaner'n'toothbrush method.... but didn't have any contact cleaner at hand. I just raked the slot pins with the same philips screwdriver i used to open the backplate and have had no trouble since (including two extended apple system diagnoses and heavy app usage). When raking you will find the pins flex a little, as if running your finger down tight blinds, maybe the contact just making flaky contact if your system wasn't completely dead beforehand i.e. random freezing, crashes and artifacts.

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It is your circuit board, logics board, or whatever going warped, like mine. Mine is very old, 7 years, and has the same problem. The ram sticks have less space between them and the main connection, so loosening the screws will help. Otherwise, just STICK THE MAC IN THE FREEZER for like 15 min to a hour, and will work fine for a couple hours. Or, go to Antartica where your macbook's heat will be nothing.

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Deep Bhagat will be eternally grateful.
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