Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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My mbp shut down unexpectedly and now won't turn back on?

I was just surfing the net, and my mbp straight up dies. When it was on, the battery was fully charged. The MagSafe was green. Now, the MagSafe does not light at all, and I can't reset the smc. It seems unlikely that my power cable is all of a sudden faulty and this caused my Computer to die completely, so I'm guessing its an internal problem. Does anyone have a place they think I should start?

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Did you get it wet at sometime? Or, did it get banged (dented)? While it may have worked just afterwards the damage could take awhile to take hold.

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It has never been wet or dented. It has, however, often been in hot environments.

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How hot? Beyond what you could stand. If so you could have damaged something.

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My office's air conditioning broke right as summer hit. So, hot! If its heat related, what's the most likely culprit?

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If the sun was beating down on it and the system was running in this elevated condition then the heat could have caused a premature failure of some component. The battery pack and the LCD are the most sensitive to extreme heat or cold.

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If you didn't get your system wet or bang it:

You'll need to open the system up to inspect it for any disconnected or damaged cables or burn't chips on the logic board. Beyond that you'll have your work cut out for you.

Are you up to taking your system apart and have access to a second like system so you can swap parts around to isolate it down by ruling out known good major assemblies (i.e. HD, RAM, etc...) by using a second like system to test them?

If not you may want to bring this in to an Apple Store or Apple authorized independent service center.

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I am up to the task of taking the system apart, however I don't have another laptop for parts/testing. I just need to know where trouble shooters would generally start looking, and with the cheaper parts I'd buy them, still cheaper than buying a new laptop.

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The problem is one of the sub assemblies could have failed causing the rest of the system not to function. Like the HD or a RAM module. You could try taking them out to see if the system even responds (one RAM module at a time, need to have at least one installed). It's also possible the logic board has failed as well. Basically you'll need to find a way to isolate out what is good Vs what is bad. Sorry, no magic here.

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Chris, when a computer is not functioning, the first step is to remove all extraneous parts that are cluttering the big picture and see if anything changes with those parts removed. First, I would make sure your AC adapter is functional with another computer...until you have seen it working, you don't have a known-good AC adapter. Next, I'd take off the lower casing, remove the hard drive, disconnect the battery, and remove one of the memory modules (as well as test the RAM slots as Dan suggested above). Take note of any dust, and blow it out with a can of compressed air, since dust conducts electricity and can be responsible for your system getting "zapped". See if you get a light on the AC at this point. If not, I would let the computer sit overnight with both AC and battery disconnected, because sometimes a laptop will take on a "bad charge", and it will not work again until this charge is allowed to dissipate. Also, repeat the RAM slot test occasionally.

If you do finally get a light on the AC adapter but the laptop won't power on, the next step is to try to jump the logic board by bridging the power-on pads with a metal object. This is because the power button/keyboard assembly in unibodies is problematic and very susceptible to liquid damage, and therefore it's necessary to try powering on the board without it. Often the board is good, and the laptop is simply not capable of powering itself on because the power button's connection to the logic board has gotten fried.

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Here is what to do;

1. Unplug everything from your computer.

2. Take off the bottom of your MacBook / Pro / Air. (There are usually 3 screws that are longer than the rest near the vent, remember where they go.)

3. Carefully unplug the battery from the logic board.

4. Wait 10 seconds.

5. Plug the battery back into the logic board.

6. Put the bottom cover back on.

7. Reboot the computer holding the "Option" key.

It often happens when you plug a cheap Chinese Lightning USB into your computer.

I posted this originally here. https://discussions.apple.com/message/26...

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Hi thank you so much for your reply. Worked for me. You're great. Thanks:D

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I have the same issue with the same MBP as you. Mine usually can be restarted after a) the battery is re-seated (taken out and put back in) or b) the battery trickles down to zero; which means leaving the MBP alone for a few days. It seems to occur during random activity (twice while accessing the SD drive, once when removing the magsafe while running, one simply moving it from my kitchen to the then (closing the lid then opening). Last weekend it locked up after trying to use the SD -- the battery reseat didnt work; I'm waiting for the battery to trickle down to zero. Geniuses are no help; they say it will likely need to be sent to the Apple "mother ship" for repairs. I may go with a local "Apple Authorized" repair shop...oh yeah, its out of warranty and I opted to not purchase Apple Care (big mistake, in hindsight).

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Mark - You should try Resetting the System Management Controller (SMC) You could also have a battery than needs replacement. Download a good battery monitoring app to see how its running and/or use the the about this system hardware info services to see what it reports on the batteries health.

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Same thing happened to me on Sunday after my gf plugged in one of those chine usb with several charging outlets. At first i was able to turn on the mbp. Not knowing what caused the shut down plugged in the charger again. Second time it refused to turn on. It has been 80 hrs now. Ps: my mbp was at 85% battery life at the time. Any advice. Should I be worried?

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Same thing happened to me. What was wrong with your mbp?

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I think the MagSafe Jack died, and then you eventually ran out of battery.

Edit: I think this because you're getting absolutely no light from the MagSafe connector

http://www.ebay.com/itm/NEW-Magsafe-DC-J...

That should do the trick. Or, the whole things toast like they set up above

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@alinorne - how about focusing on current Q's. This one is from July '13. I'm sure the OP has lone since repaired his system.

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iFixit email said I should, so i did. :)

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Chris will be eternally grateful.
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