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2.26 or 2.4 GHz / White plastic unibody enclosure

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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

par

Did it turn on?

par

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11 solutions

Solution retenue

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)

Block Image

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

Block Image

Hope this Helps

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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.

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

thanks

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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.

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

Thanks in advance

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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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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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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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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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Thank you so much, it worked for me!!! :)

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I have a macbook air it doesnt turn on and yet sometimes it will turn on last a minute or two and then kaput, pretty sure this is the logic board.

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Nate sera éternellement reconnaissant.
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