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Released October 2008 / 2.4, 2.53, 2.66, 2.8 or 2.93 GHz Core 2 Duo Processor

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MacBook Pro (Late 2008) Wont Turn on

I have a late 2008 MBP that will no longer turn on. The orange/green light on the magsafe connector lights up but nothing happens when I press the power button. I suspect its the logic board since OSX was often freezing prior to this and I had to hold down the power button to do a hard shutdown. I know there is another little board that the magsafe connector connects to, but since the magsafe connector is lighting up I dont suspect that. Just trying to pick some brains on here. Thank you in advance.

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I tried all the great advice and nothing worked. I replaced a new (refurbished) battery and it started. I knew the battery was dying on me but held off on changing it. I guess I needed a functioning battery to restart my macbook even though the old battery showed 100% charged and the power plug was in. Just wanted to leave my feedback to this great community of Mac users. Thanks guys.


I'm glad you fixed it! It can be tedious, grueling work. Must feel good.


There is this youtube video on a person who warmed up the keyboard with a blow dryer before starting. I now have to do that. Miserable but it is the price I have to pay to be cheap and hold off on upgrading my computer (AKA buy a new one.).

Ok here is the video:



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Выбранное решение

Mike: you may try and open the laptop up ( following the infix it guides) and disconnect the battery and power cord. Then press the power button for ten seconds, then put it back together and see what happens. Sometimes the controller locks up after a bad shutdown and those steps should reset it. If that doesn't do it, then let us know and we'll try to offer another suggestion or two. Good luck

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I saw that tip somewhere else and did try that with no luck. My MBP has a battery access door on the back so I didnt quite disconnect the battery but I just pulled it out for awhile and then put it back in, held down down the power button for 10 seconds and then reconnected the magsafe connector and still nothing.


Mike: it may seem trivial, but please try it again but hold the power button down with the battery out and power cord disconnected. Then put it back in and try it. Sometime the key is in the details.

Next step would be to look at the logic board for anything loose or signs of overheating.


Hi would somebody have another tip to try?:)


Hello there , i know is been quite long time ago , but this can be for help to someone else too ....

did you try to see at C7771 if has 1.1 Volts ..... give it a try mostly likely is that

here a link where Mr.

Louis Rossmann

very short and strait to the point


hope can help



The one I’m fixin is old enough the battery isn’t probably worth a hoot so would this work if it’s on MagSafe power?


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I have the same Macbook that has been ‘dead’ for the last three months. I tried everything, SMC reset, power button held down while plugging the charger in, battery off, battery on.

Nothing worked until today when I tried something different: heat. Lots of it. I ran a hairdryer over the keyboard, top-case and bottom panel (battery cover removed) while occasionally hitting the power button. After heating up the bottom panel, I flipped it back over and tried the power again: success.

Hope this helps someone. I think the trick for this machine now is to never shut it all the way down or to hibernate.

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I went through every comment trying what people suggested and when I got to yours I said there’s no way this could be true. I grabbed my blow dryer and blew it at the screen for 2 seconds and poof it works like before thank you sooo much!!!


Incredible! this work. For me I had to heat for a few minutes, then I did the SMC reset and it works. This is not magic in fact. IT seems to be related to a deficient capacitor on the motherboard. https://www.youtube.com/watch?v=pvy-WrDd...


I also ran out of options, and thought this hairdryer method was a bit crazy—I tried it, and my 08 pre-unibody powered on long enough for me to reset the NVRAM and get video output! I was able to boot up OPNsense off a USB flash drive (closest thing to a bootable OS at the time), and the machine stayed on!


Update: After pulling the CMOS battery, the machine would boot up as normal without heating up with a hairdryer. Unfortunately, the next morning, it was back to black screen, failure to POST, no chime. I did open up the machine, replace the thermal paste, isolate the thermal sensors, and nothing seems to impact the boot sequence (even disconnecting the CMOS battery for extended periods of time).

Back to square one, I guess.


Hey, I've got the same problem - after 2 months unused MBP Late 2008 won't started. Power adapter led is green, battery indicator is 100%. And no reaction to Power button press, long (10+ sec) press, bateery-off power on, SMC reset combination.

To be honest I thought about this idea with hair drier as stupidest I ever read. But I've tried. And it is started. Unbelievable! :) Thanks ! And sorry for my believe-less ;)


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Try an SMC reset.

Connect the power adapter to the Mac. On the MacBook Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time. Release all keys and the power button at the same time – the little light on the MagSafe adapter may change colors briefly to indicate the SMC has reset.

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Outstanding! Worked like a charm. For those wondering, it did take a few seconds for it to turn on.


This worked for me! Thank you!


Did not do anything


It worked!!!!


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it may be relative

but I was starting to think about taking the macbook late 2008 aluminium to the service center in the city I live.

I did several times all the steps shown in this link, but nothing worked.


What actually worked for me is the experimentarion of making the steps given in the link and also letting battery out, pluggin the magsafe to the laptop without a battery installed.

It is on right now, guess gonna see how it goes.

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Hello, the laptop is turning on normally but battery is not present, and it has turned on twice without hesitate.


I did the same magsafe with no battery and i started right up. Also when i did the shift+ crl +opt and power button the caps lock light turned green. What does that mean?


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Louis Rossmann adresses the problem in this video and shows a solution, which is resoldering a capacitor.

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My old MBP late 2009 have similar problem now. The tipp, pressing keys don't work.
Replacing this cap, as in video shown, is not my ding.
Coul be the CMOS batterie empty?

Modellname: MacBook Pro
Modell-Identifizierung: MacBookPro5,1
Prozessortyp: Intel Core 2 Duo

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Hello 👋🏻

Could be more helpful if you do some test

Plug the charger … color of it ?

Then be VERY careful now

Disconnect power and do not short anything

Then also open bottom lid

Disconnect the battery

Press power for few seconds ( 5/10 )

Re- connect battery

Color of MagSafe again ?

Reset SMC

Color of MagSafe again ?

Press power and see if start …

Yes not …..

Did you replace and check C7771 +- and 1,05 volt to …?

this is a common issue , on this video you get the most brilliant information


Let us know

Ciao 👋🏻

Update (01/21/24)

Hi there 👌🏻

Thanks for your fast reply

Well I guess you mostly like have a C7771 broken !

Well red light is a very good sign 👍🏻

It is charging!

I strongly recommended to misure the C first

Then if you have experience in soldering

Will be very easy to replace it

But you need a good lens

May be two soldering or hot air station !!! Be very careful with it

Some flux

And of course a new 330UF tantalum capacitor 2.5 V NIT 2.0 V ( old one )

Block Image

Let us know 👍🏻

You are from Germany right ?

To far otherwise I would do it for free 👌🏻

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Ok then I get a very nice video where Mr Paul Daniels

shows a brilliant way to do the same job in a different way




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I completed all resets / keyboard combinations - LED colour of MagSafe always red. I also tried to start the MBP without the battery.

“Did you replace and check C7771 +- and 1.05 volt to ...?“ - not yet measured.

Video - "What causes no power most 2008-2009 17" Unibody Macbook Pros & how to fix it."

I've already looked at it - although I soldered a lot before the time of SMD technology, but I lack experience and the necessary equipment for SMD.

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