MacBook wont turn on, will display green adapter light/orange charging

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MacBook Unibody A1342

2.26 or 2.4 GHz / White plastic unibody enclosure

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Nate @nate68795

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Postado: 23 de jun de 2012

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MacBook wont turn on, will display green adapter light/orange charging

Well im hoping you guys can help me out a bit.

my macbook suddenly stopped turning on. It will show green when i put my magsafe in and it charges the battery (orange light) but thats it. No chime no screen response.

Now i have heard of this 'jumping' idea to turn the macbook on directly from the logic board, but i cant quite work out what exact componets i have to touch, does nybody have a picture showing which parts i need to touch on this model to get it to jump?

or are there some things i have missed? i have tried removing battery, unplugging HDD, taking out ram, smc reset etc

i really dont want it to be the logic board :/

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Thats great! thankyou very much

25 de jun de 2012 por Nate

Did it turn on?

25 de jun de 2012 por Owen Cunneely

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Owen Cunneely @therepairgenius

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Postado: 24 de jun de 2012

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You are in luck. First what you will have to do is remove the bottom cover of the MacBook. Then you will need to jump these two contacts (top picture, ignore bottom one)

they can be found to the left of the red square on this picture and over the two smaller connectors.

Hope this Helps

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Nate @nate68795 Rep: 59 2 1 · Answer 1 · 2012-06-26T15:40:29-07:00

Nate @nate68795

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Postado: 26 de jun de 2012

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i tried but unfortunately it didn't work, pretty sure the logic board is dead. thanks for the help though!

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Keep in mind, you need to disconnect the keyboard/trackpad ribbon cable before jumping the machine. This model commonly has a sticky power button that will get stuck in the depressed position, and, again, if this is the situation with yours, it's not going to be jump-able until you disconnect the ribbon cable.

26 de jun de 2012 por rdklinc

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Nate @nate68795 Rep: 59 2 1 · Answer 2 · 2012-06-27T10:37:35-07:00

Nate @nate68795

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Postado: 27 de jun de 2012

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i did not know that, i shall have another go without the cable in!

thanks

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Glenn Van Den Neste @glennvande73884 Rep: 1 · Answer 3 · 2012-08-27T11:57:07-07:00

Glenn Van Den Neste @glennvande73884

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Postado: 27 de ago de 2012

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Thanks for this. It worked my mac is running again.

One question tho? Can i insert the keyboard cable again once its running?

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I got mine running sort of after jumping the power with the ribbon cable disconnected but the display does not come on, no error beeps, no lights except the power adapter.

23 de jul de 2014 por Greg C

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jignesh patel @jigneshpat81661 Rep: 1 · Answer 4 · 2013-05-21T18:42:50-07:00

jignesh patel @jigneshpat81661

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Postado: 21 de mai de 2013

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Can anyone tell me how to perform "jumping" on logic board??

Thanks in advance

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Fred Guevara @fredguevara Rep: 1 · Answer 5 · 2013-09-19T21:39:50-07:00

Fred Guevara @fredguevara

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Postado: 19 de set de 2013

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I need help looking for the jumper for the model mb991LL/A. Can anyone help me out.

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Phil Rydin @philrydin Rep: 98 6 · Answer 6 · 2014-03-24T06:51:01-07:00

Phil Rydin @philrydin

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Postado: 24 de mar de 2014

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look at the picture, you need to short these 2 connections together, a small flat screwdriver would do it, just short out the connector, and that would act like the power button, i guess it tests whether its anything to do with a sticky on off button. my macbook has the same problem, i will try later today!

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Eva Tahon @evatahon54919 Rep: 13 5 2 1 · Answer 7 · 2015-03-14T01:32:36-07:00

Eva Tahon @evatahon54919

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Postado: 14 de mar de 2015

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super, this worked totally for me!now do i have to replace the keyboard or can i try to clean it out somehow?

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Nielven Araullo @nielvenaraullo Rep: 13 1 · Answer 8 · 2016-03-06T08:31:43-07:00

Nielven Araullo @nielvenaraullo

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Postado: 6 de mar de 2016

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Hi there,

Sorry I'm not a computer wizard. The jump start process - so I have the battery connector off the board and how will I get into the process of jumping the power?

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