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Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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Sometime stalled for some seconds

Hey everyone,

maybe someone can help me. My Macbook stalled for some seconds, this happend every time I use it. When I open websites or applications, when searching, open a file, change finder window check mails. At every action I do, this could happen and it happend very often.

I change the hdd to an SSD -> same problem

change the SSD twice -> same problem

change battery -> same problem

change RAM -> same problem,

reinstall the OS and migrate the time machine backup -> same problem.

install OS Sierra complete new -> same problem

install El Capitan complete new -> same problem

install complete factory OSX Lion -> same problem

the cpu temperatur ist different it happen at 50°C and 80°C

I will change the CPU fan but I think this won't solve the problem.

Could this be a late impact that my daughter put a litte bit of coffee at the keyboard, but this was 1,5 years ago. Could the be the hard drive cable?

Maybe someone could help me this would be fine.

Answer this question I have this problem too

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How much ram is installed? if that amount is low that might explain it. Of course liquid on the keyboard which might have gone through to the mainboard could be another cause.

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16 GB Coirsair RAM. the RAM works fine, installed it some years ago, make a memtest and no errors.

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With 16GB this stalling should not happen, then I would more think of a liquid damage.

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but 1 1/2 half year later? well I search in other forum and found that some other has similar problems and the hard drive cable was damage, so I will check this and if it is ok then the liquid damage is possible, maybe I should go to an authorized service provider, but thanks for your help

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Hope it is the cable

When it comes to the liquid it could be corrosion that works over time.

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Yeah, I had this problem. only one usb port was working the other one not, I open the cover and see corrosion at the logicboard. I clean it with industrial alcohol and the usb port works. hope it the cable :D

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torstenhaendler will be eternally grateful.
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