Saltar al contenido principal

Modelo de mediados de 2012, procesador A1278 / i5 a 2,5 GHz o i7 a 2,9 GHz.

Preguntas 1622 Ver todo

MacBook Pro 13" A1278 wont turn on

I bought a macbook pro 2012 A1278 model yesterday off ebay for around 200 knowing that was something wrong with it. He said that the macbook one day randomly shut off and just would not turn on afterwards. He mentioned that there was no water damage and I checked to see if there were anything wrong with the logic board and it looks alright from what i can tell. I checked it and the led from the magsafe charger is stuck on green. I tried the battery indicator and it flashes 5 times rapidly and then it stops (This happens when it is plugged into the wall).

I tried resetting the SMC and PRAM reset and nothing has got it to work. I was wondering if I maybe need a new battery or something. The entire body of the mac is pretty good with a small dent on the back cover but besides that only a few minor scratches. Just asking few any tips or anything that will help me power on this macbook pro.

Contestado! Ver respuesta Yo también tengo este problema

Es esta una buena pregunta?

Puntuación 0
Agregar un comentario

4 Respuestas

Solución Elegida

Unplug the mag-safe. Disconnect the battery from the logic board. Press and hold the power button for five seconds. Reconnect the battery and mag-safe. You should get a spontaneous reboot. Let us know your results if you do not (because your basically screwed if it doesn't).

You also paid to much for it with these symptoms. Better to ask enough question that you are reasonably sure you can fix it. Else wise you are buying a pig in a poke and depending on our goodwill to help you repair it for free. In other words you are using us, and I'm just a working tech and my time is worth $87.50 to $130 per hour.

Fue útil esta respuesta?

Puntuación 5

5 comentarios:

Yeah i think im screwed but was it supposed to power on immediately after I plugged it into the magsafe and after I reconnected the battery or was I supposed to turn it on. (also are you sure a new battery can't fix this?)

- de

I appreciate the help nonetheless

- de

NEW SYMPTOMS! So apparently my charger is now flashing between orange and green and the battery indicator showed one green dot for a second and then it stopped but I something!

- de

That battery needs about a 20% charge to work. It sounds like it a goner. Your mag-safe when plugged in should turn green and then orange. Do you have a know good adapter? If so leave it plugged in for several hours and see if you can get a charge on it again the redo the battery disconnect trick.

- de

Yeah i just changed the adapter now Im just gonna wait until maybe I get a charge, ill update again in a few hours!

- de

Agregar un comentario

Disconnect the battery from the logic board. Press and hold the power button for five seconds. Reconnect the battery and mag-safe.

Fue útil esta respuesta?

Puntuación 2

1 comentario:

@iam_sarah: thank you! It took me a moment to find someone who could suggest a workable solution!

- de

Agregar un comentario

Hello, this might be pretty late, but I have the same model and I just face that problem!

I turn off mine normally then this morning tried to turn it on and it didnt, it had a battery and everything, tried everything until I disconnected the battery and it turn on, then I turn it off plugged it again and try to turn it on, it didnt… So had to do the trick again and it turn on.
My question is did you fix this problem by changing the battery?? or what did you do?

Fue útil esta respuesta?

Puntuación 0
Agregar un comentario

In the case of macOS laptops, here is what to do if your MacBook Pro won’t turn on.

1. Check for Black/Blank Screen

MacBook Pro on a desk

When you initially tried to turn on your MacBook Pro, did it not turn on at all, or did the screen stay black?

A black screen is a common problem for laptops and is not restricted to Apple. Before you do anything else, ensure you didn’t accidentally set the brightness to zero.

There are two keys along the top of the keyboard with sun icons on them. One is to darken the display, and the other is to brighten it. Although most laptops won’t go black with this setting, it still needs to be confirmed. If the brightness does not affect the black screen, move on. Turn off the laptop, remove all attached peripherals, and turn it on again while listening carefully.

Do you hear any whirring? Any beeps? Fan noises? If you hear something but see nothing, it may be the screen, not the laptop. If you hear nothing, you need to troubleshoot further.

2. Boot to Recovery Mode

If you hear noises and receive feedback while performing actions, but the screen is black, you can try to boot the MacBook into Recovery Mode to repair any issues it’s having.

To boot into Recovery Mode, press the Command + R keyboard combination. If this action works, you should see the macOS utility screen. MacOS Utilites

If Recovery Mode was successful, reboot your MacBook, and it should start normally. If not, continue reading; there may be other issues.

3. Check Power Connections

MacBook Pro charging

Plug your MacBook Pro charger into the laptop and the wall socket. Verify both connections are tight. Ensure the power cord isn’t damaged. If nothing happens, try a different wall socket or check the one you’re using with another device.

If the outlet works, check the power cord or adapter. If you’re fortunate enough to have a spare of either, try them. If you can borrow a spare for five minutes, do that. If the laptop still doesn’t work with a different charger, continue troubleshooting.

Note: The charger used should match the specs of the OEM charger for your specific model.

Make sure that you’re using Apple-branded cables if possible. Some third-party charging cables do not have the correct amperage needed to power your device correctly, or the wires are brittle inside and could be damaged. Using the cable and charging block that came with your device may be the trick to getting your computer turned on.

4. Perform a Power Cycle

The next step involves performing a complete power cycle of your MacBook Pro. Although this may seem counterintuitive, this is a simple solution that works most of the time.

All you need to do is plug your MacBook into its charger and hold down the power button for a minimum of ten seconds. This action cuts all power to the laptop and is the equivalent of removing the battery. You may hear a noise as you do this.

Once you have held down the power button and released it, leave it off for a few seconds and then press it again to start the MacBook Pro as usual. MacBook Pro Power Cycle

If you’re fortunate, it will boot successfully. If not, the MacBook Pro will still fail to start, and you’ll need to keep reading.

5. Reset the SMC

MacBook Pro SMC Reset

The SMC is the System Management Controller. It manages all the low-level functions of the Macbook Pro, such as the power button, display, battery, fans, motion sensing, keyboard, indicator lights, and other similar elements. Resetting the SMC is usually left until last as it resets many settings back to their defaults. If you have gotten this far without a successful boot, try resetting the SMC on your MacBook Pro.

Unplug the laptop from the charger and peripherals.

Hold down Shift + Control + Option and the power button for ten seconds.

Let go of all keys and reconnect the charger.

Then, press the power button to boot your laptop.

If an SMC error was causing the MacBook Pro not to boot, it should now boot normally. You will have to reconfigure some hardware settings once it successfully starts up, but it is a small price to pay for getting your laptop working again. This setback is undoubtedly better than professional maintenance, which takes time and costs money.

This may help you,

Rachel Gomez

Fue útil esta respuesta?

Puntuación 0
Agregar un comentario

Añadir tu respuesta

my bucket estará eternamente agradecido.
Ver Estadísticas:

Ultimas 24 horas: 5

Ultimos 7 días: 39

Ultimos 30 días: 146

Todo El Tiempo: 9,234