Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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Completely dead MacBook Pro, won't turn on.

I was using this MacBook Pro. I bought it over a year ago (so no warranty anymore) at an Apple store here in South America. (EMC 2554, late 2012)

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I turned it off, everything seemed normal, but the next morning it wouldn't turn on again. It won't even start up: absolutely no sound, as if it was completely dead.

I checked the battery indicator and it was completely charged. I opened it up and disconnected the battery, plugged in the MagSafe charger, and there was still no response. I plugged the battery back in and no response. Plugged in the charger and connected the battery and no response.

I took out the hard drive and all my info was there; it would mount on a different MacBook Pro with no problem, and luckily I got all my files backed up.

So I know the hard drive is not the problem. The fan won't even move when trying to turn it on.

I tried taking out the RAM, one by one, no RAM at all, switching them from slot to slot: no response.

Tried out all of the key combinations on the keyboard as well... still nothing.

I don't know what else to try. I read somewhere that the on/off button is connected to the ribbon cable from the keyboard. I checked, and it is plugged in correctly to the logic board. I'm afraid my logic board is dead, but after only a little more than a year????

Any guesses?

Thanks for your help.

Contestado! View the answer Yo también tengo este problema

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Any update on this? I'm experiencing the same thing currently with my system.

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tryout this post see if this helps http://bit.ly/2hHuZSg see if this helps

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There are 12 versions of this model - yours is a 2012? Newer models will not boot if there is no battery present, and that battery must have about a 15% charge.

Try a different battery before you blow up your board fooling with it.

Start with the easy, basic stuff; work toward the harder, more expensive solutions.

If this answer is acceptable please remember to return and mark it.

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I swapped batteries with a similar macbook pro that had the same battery model. It turned on but no apple appeared. I was glad for a moment but I turned it off and tried to turn it back on and no response. I switched the batteries back (the original battery had full charge) and forward, plugged in the charger too, but it won't turn on again.

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Take the battery out and let the computer it sit overnight to discharge capacitors (not plugged in either). Next day put the charged battery in and connect the laptop to a wall outlet. Attempt to boot... wait 20-30 minutes before turning off. If it tosses any errors note them. Try a Safe Boot (shift boot). In the mean time put the "problem" battery in the battery donor machine and attempt to start if boot use System Information to check that batteries status.

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I tried what you instructed but it did not turn on, no response =( The only light that turns on is the magsafe connector and the battery status.

The problem battery seems to be fine.

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Sound like a logic board problem - can you get to a Apple Certified shop for an estimate of what's wrong... Is there any other history you left out- power surge, liquid spill? It's extremely rare that these just suddenly stop working.

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No other damage, but just this moment i tried powering it up again. First a small light to the side of the light that turn on when it powers up came on, i got the chime and now its stuck on the apple logo, loading... I'll keep posting any news.

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The misinformation here is mind numbing.

a) It is the opposite - newer models will turn on with no battery, and when you plug them in they will turn on by themselves. Only certain older models required the battery to be charged to turn on.

b) No you do not BANG it to make it turn on, this is BS.

c) Measure PP5V_S5 and PP5V_S3 voltage rails.

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Whether I approve of the answer has nothing to do with it! It doesn't change fact.

Any sandy bridge, ivy bridge, or haswell based Apple notebook will turn on without a charged battery. Not only will they turn on without a charged battery; they turn on by themselves the moment the magsafe is plugged in if it is not closed(besides 820-2850, which this is not)! To state that they will not turn on without charge is factually incorrect information. If factually incorrect information stays up without correction, it will hamper someone else's ability to repair this problem, because they will not understand how the system works.

My aim is to spread proper and correct information that will lead to working devices and sustainable repairs. This includes correcting false information and this includes telling you that banging a machine on the table to make it work is BS, and I am NOT shy about this! If these are the repair tactics we teach buy subdomain idropitoutawindowandsayifixit.com.

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Louis - Apple Disagrees with you. According to them it is entirely possible to have a machine that will not turn on when you plug it in.

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No they don't. I specified sandy bridge, ivy bridge, and haswell based machines ONLY(excluding 820-2850); which includes the original poster's machine. That article you linked to references all Macbook Pros. Please read before commenting! +

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It's moot point not mute point unless, of course, you where referring to the point actually falling on deaf ears which, in that case, you are correct but, passed on the inference you original statement is incorrect.

I have the same problem, a macbook pro that will not boot up or start depending on how pedantic you are and, I have not found any source that has provided a solution. Sorry for wasting anyone's time but, I could not resist further expounding upon an argument over something so trivial.

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As dumb as it sounds - bumping the four corners on a solid surface(without doing damage) worked in my case and appears to have worked for others. So saying it is BS is narrow minded. Maybe we need to know what the bumping is doing to restore power. It's easy to try and harmless to try- if you are not an idiot with it and bang it too hard. Take path of least resistance first.

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No joke I banged on all for corners. It worked. Knock on it like you'd knock on a door. Not too hard but not too light.

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The !&&*? Worked for me, on the second trial.. Crazy but it's true

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Yep worked for me thank you so much for sharing this. I was a bit harder on the knocking in the end though. No joke I agree I'm just stunned and eternally grateful

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This worked for me too MacBook Pro 17 2011 SSD (so not a spinning disc hard drive thing) - Known old battery that will not hold charge. I had a brick - did the four corners and lights on keyboard came on. Held power button to shutoff and it powered on as it should on the next try. I Was Like - You Gotta Be Kidding Me!! Works

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The newer machines do not come with a system installation DVD. Your machine shipped with 10.7.3 installed.

To reinstall the system or run Disk Utilities, start up holding down the Command and R keys.

Here's how to do it: http://www.apple.com/osx/recovery/

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I got to the hardware test using the D key but the main problem is that the computer wont boot.

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I'd say you may have to ship it to Apple South Africa, or, contact them/look for a nearby Apple Certified repair center. Generally with todays electronics they either work, or they don't (like light bulbs) an intermittent problem I would put down to either a failing cable, cracked battery or loose component from a drop. Picking up the laptop by on side or corner flexes the case to either short, or un-short, the problem. I had a cracked battery that caused non-charging, starting issues, it was intermittent. It was the devil to run down. You could not see the crack until the battery was lifted out of the machine - but then it was evident. I was lucky it didn't start a fire! Some idiot stuffed his briefcase on top of my laptop bag while it was in an overhead bin in an Aircraft. I didn't realize he'd damaged the machine for a couple of days.

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Angela - did you find a fix for this? I have the same problem but i haven't been able to turn it on...

Rob

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I had same exact problem. Banged its corners against a table, and it fired right up. I bet it's connector corrosion.

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Guys i have a 2011 macbook pro 15inch , i have the same problem and i discovered a way to make ot work again.. all u need to do is to reset hold down the cntrol,option, shift keys together with ur power button then aftr just press the power button and wait for it for a while given dt u still have some b3 life on ur mac then leave it for a while. After you notice that ur b3 life is gone then switch it on again and hopefully dt might work.

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Incredible but true: I did exacltly the same thing after trying all kind of keyboard combinations (wchich didn't work) on a 4 year old Macbook Pro Retina 15":

Shut off the laptop. Bang it wil all the 4 sides against a table (I was desperate) and yes: it magically came back to life. Thank you very much !!!!!

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Workrd for me too! Had a brick. Charger cable verified working - no sounds/lights /nothing. Did the Four Corners , a couple times around. The lights on the keyboard were on but no screen. Held power button till shutdown and then pressed to power up. Came on as it should. Hard to believe maybe - but it works - Macbook Pro 17 SSD and a known weak battery. Computer had been sitting for several months without use.

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Well, I know it is bizarre but my relatively new (late 2015) MacBook pro failed on me twice during last month. In both cases, I became desperate enough to

A) buy a set of screwdrivers to open it up

B) send it to an authorised apple centre

But I did not perform above actions, instead, done the following that worked for me on both occasions. As said I had no option to try on and ALL other solutions didn't help me at all including resetting SMC. So what I did was, I put my hand on the keyboard with a gentle pressure and moved it from right to left, in a way that it pressed a number of keyboard's keys at the same time. AND IT worked !!! Whether there is a lose connection underneath OR the move triggered a specific combination of keys that has not been published, I do not know. But I do know it worked for me twice. So give it a try, it might help you too !

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I was gonna start banging my macbook on the table before I read your post, so I did the left-right hand swooping technique on the keyboard and it fired right up! Thank a lot Amir

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Do the keyboard thing. It works. Glad I didn't go to the Apple store. Had the same prob before and the Apple store ppl ended up changing the motherboard

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Angela I think your problem is not the battery (which you've already replaced it with a similar one) but your HDD.

If you have practice disassembling the hardware of your HDD and turn on the computer with a USB where there is an Apple OS (on the internet you will find many articles to create one). At this point if the computer is turned on you will understand that the logic board and battery (perhaps very used) are good and you'll only have to reinstall the OS on a new hard drive! ;-)

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Um, they said they removed the disk and got all the data off of it. Why do you people take time to post when you clearly have no expertise or even basic reading skills? Many Mac users like to think they know what they're talking about, but miss obvious things so often.

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all u have to do is disable the battery and battery meter for 10 seconds

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If the computer won't boot, how does one do this?

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I have the same issue and I surrender for almost three months now, and just this morning I open my macbook and look for it's RAM, I removed it both and clean it using an eraser (the teeth like part) and clean the other parts of my mac, now when I put it back and turn on the macbook it work finally!

NOTE: Do not touch the teeth-like part just clean it with eraser.

hope this would work with yours! Good Luck!!! :D

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I recently replaced the glass and it did not boot up afterwards, no lights, nothing. Noticed the antenna and bluetooth cables exposed, i.e. black cable covering not there, where the cables come out of the display. I don't know how this happened but a piece of black electrical tape around the silver exposed parts did it for me.

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My problem - macbook pro completely dead. Shift/Control/Option keys didn't work. Mag Connector light not on. I thought the battery was OK because i used the laptop the previous night. Got it all working again by plugging into a different wall socket. Was a combination of flat battery and bad wall socket.

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Having exactly the same issue with my MacBook Pro 13" (early 2015) that I bought new in November 2015. Took it to Apple, they say they can't replicate the problem therefore there is nothing wrong with it (which I'm pretty annoyed about) - I've discovered that if it does decide to switch off and become completely unresponsive, all I have to do is to physically turn it upside down, then back the right way up, and hey presto, it starts up every time.

...not sure I want to be stuck with a £2k mac that I have to keep fricking turning upside down though!

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*bought new in November 2016

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Well crazy but true. My vintage MacBook Pro died wouldn't turn on tried everything was stating to mourn its loss. Last resort slam lid shut bang on its back 4 times pretty hard and pressed on button bingo it's started and working fine. Shocked and speechless an under statement. Thank you so so much, no way could I afford to buy a replacement so have spent 4 days gutted and trying everything......one very happy girl now

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It's possible that the charger is not working.

Try charging with someone else's to find out

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I started with a brick. Verified good charging cable and power but getting no sounds or lights or any signs of function. I did the bump all four corners on a solid surface. went around a couple times to be sure I had done something maybe? The keyboard lights were on but no screen. Held the power button to shutdown and pushed again to restart. It powered on as it should! I know crazy repair tecnique, but it works and it is easy to try without overdoing it and damaging anything. This was on a MacBook Pro 17 SSD and 16g ram - with a known weak battery. This one had been sitting without use for about 4 months but was a known great computer at shutdown.

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SOLVED! I want to share how I fix it. My MacBook Pro had same problem. Last night I turned off my comp, but next day cannot turn on. I searched internet-nothing work. Sound like on/off button doesn't do connection to comp. I removed bottom cover (unscrewed first) and located spot under button on/of. There tree connectors together and one little bit on side (they are very small). I disconnected and connected back one by one - that all what I did. And my comp work again. Do not touch by fingers and do not use any metal to those connectors, because can be electric shortage. I used tooth pick to lift connectors and plastic side of small knife to press back those connectors. Do not disconnect all at ones- you can forget where they belong to- do it one by one.

Same time you can clean there dust around - just blow air. Before long time ago I did fix another comp for other problem-some connection wires was fallen off right under key board, some was just sit on top of their nest and wasn't pressed down.......

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