Connettere a bassa tensione dopo ogni riparazione (solo MacBook Retina 2015)

Scritto Da: Jeff Suovanen
  • Commenti: 23
Connettere a bassa tensione dopo ogni riparazione (solo MacBook Retina 2015)

Difficoltà

Molto facile

Passi

2

Tempo Necessario

1 - 15 minuti

Introduzione

La prima generazione di MacBook Retina da 12" ha una strana progettazione che richiede di collegarlo a una bassa tensione dopo una riparazione. Se salti questo passaggio, potresti causare dei danni permanenti alla scheda madre. Questa procedura non è richiesta per i modelli del 2016 e successivi.

Collegare il MacBook Retina ad un'alimentazione a bassa tensione richiede una adattatore AC da 5 W (come quello che trovi con gli

iPhone) e un cavo da USB-A a USB-C. Nessuno dei due è incluso nella confezione originale del MacBook.

  1. Sq24oZSQfCl6ToXv

    • Usando un cavo da USB-A a USB-C, collega il tuo MacBook ad un normale caricatore da 5 W per iPhone.

    Just posting a comment to reinforce the fact that applying the low voltage power is necessary. Don’t skip doing it or you may ruin your (probably expensive) replacement logic board!

    David Manley -

    I applied higher voltage for a short period of time, maybe 3 minutes. Is the damage instantaneous? Have i trashed my logic board?

    Emmett Verhoog -

  2. OcgGSPlrPlTBOSWT

    • Collega il caricatore ad una presa della corrente protetta contro le sovratensioni.

    • Aspetta finché non senti il suono del collegamento all'alimentazione (dovresti anche vedere il simbolo id carica sullo schermo).

    • Solitamente dovresti sentire il suono entro 10 secondi, a meno che la carica della batteria sia molto bassa. In questo caso può richiedere fino a 15 minuti.

    • Accendi il MacBook premendo il tasto di accensione.

    • Una volta acceso correttamente il MacBook, puoi scollegare il caricatore da 5 W e usare/caricare il tuo MacBook normalmente.

    • Se il MacBook non si accende dopo 15 minuti, potrebbe esserci un problema con la tua riparazione.

    This is quite scary. I wonder what the technical explanation for this behaviour is?

    Is it safe to just power it up using the built in battery? And then once it powers up, plug in the normal charger?

    Cool_Breeze -

    Is this necessary for the MacBook Pro (Retina, 15-inch, Mid 2015) 2,2 GHz Quad-Core Intel Core i7

    Where do I plug the usb c cable ? I can’t see any suitable port

    sissi -

    Is it necessary to use an iPhone charger, or can e.g. a 5W Samsung charger work?

    Ólafur Jón Thoroddsen -

    @cool_breeze applying 5v from USB is required to "jump start" this model or else it will not power back on. Essentially there is a battery cut out that requires external power to re-engage it.

    @sissi this step is only required for macbooks (not MacBook Pro). MacBook Pros do not have any such step needed to power back on

    @olafurt Yes any 5w charger will work. All that is required is 5v, 1A USB power using a USB a to USB C cable.

    Garns -

    This article's description should be revised to clarify that it does NOT apply to MacBook Pro models.

    andybaird -

    It can take longer than 15 mins to restart. My battery was completely flat and it took about 45 mins before the MacBook showed any signs of life.

    Shayne Riches -

Conclusione

Per rimontare il dispositivo, segui le istruzioni in ordine inverso.

Autore

Jeff Suovanen

Membro da: 06/08/13

426762 Reputazione

15 commenti

I recently did an upper disassembly on my MacBook 2015 and was doing the steps for a low voltage power up but when I plugged the power in the MacBook made the startup noise for a second then restart and did it again in these short cycles. I’m wondering if I improperly did the start-up process or perhaps something else is going on?

John Wiedemer -

Hi John, I have the same problem, have you found a solution ?

maxime.duret -

What sort of logic board damage might happen if this step is not followed? One of our customers brought us his 2015 MacBook after attempting to replace the battery himself. The new battery is not recognized, and the computer shuts off after about a minute even when plugged in. Could this be the result of him not applying the low voltage power?

clover -

Did a batter replacement and woops… used a 10W supply for 15 minutes.

Then noticed my mistake and changed to 5W supply, but computer does not start at all.

Could this be the “logic board damage” mentioned?

Niels Koldsø -

I just replaced a new battery on my MacBook ProRetina Pro early 2015 and bought this cable and adapter after following all the steps and instructions but when I plug the cable in, the display screen is still off (black) no chime sound of battery charging symbol on the screen. I plugged everything back in correctly and followed the steps exactly how they said and my mac won’t display anything. What could be wrong?

Ervin Valdez -

hello, after battery replacement, I followed the low voltage start up however I got repeated chime noises on boot with a blank screen. I have yet to attach the adapter that came with it. It is a early 2015 model. Any help would be great.

roohi vad -

A year has passed, did you get an answer..?

Mike A -

Is a 2.5 Watt charger sufficient to get the job done, or will the laptop not turn on at all?

Stefanie Sulzer -

Does this step apply to the MacBook Pro (Retina, 15-inch, Mid 2015) A1398 ?

I wanna replace the trackpad, but mac doesn’t have a USB c port, should I use some sort of adapter or just skip the step?

Please reply

sissi -

You are fine, this step only applies to the 12" Retina MacBook from the same year as your MacBook Pro.

Aydan -

Chime, chime, chime and nothing else… 30 minutes and counting. I painstakingly followed the removal and replacement directions and now the computer will not fire up with the iPhone charger as directed. With my old, completely dead battery it would at least start up before if I kept the computer plugged in. It is a 2015 model.

Has anyone received any answers beside there may have been a problem with the install? “If the MacBook fails to power on after 15 minutes, there may be an issue with your repair.”

Is there another procedure to follow?

Mike A -

Seems no-one is getting any answers so I’ll just post my experience. I foolishly didn’t visit this site first so at first I had used the standard USB-C Charger and battery wasn’t recognised but mac booted with no chime but didn’t recognise battery. I put old battery back in and whilst it still said service battery it was at least seen. At this stage keyboard and trackpad wasn’t working but power button wasn’t. I then came about this article but only had a 10W charger available. The mac continued to boot off the original battery with no KB/Trackpad. I conceded and re-seated all cables again and fully closed lid and put screws back in. Then the keyboard and Trackpad worked. Just had no sound. So either the case has relevance or this time i re-seated the TP cable correctly. If that’s the case, I’m hoping the audio/headphones jack cable just needs re-seating which I will re-attempt when the next replacement battery arrives.

cameronpenna -

Does anyone know exactly which 2015 Retina MacBook models this applies to? All of them? I'm applying 5W to mine after repair and not getting a chime.

R McP -

Just put in a new battery for my 2015 12" Model. By far the most time consuming task is removing the old battery. I used a syringe full of Isopropyl Alcohol to get some underneath the battery pouches, and then an old loyalty card to try and lift the old pack without bending it. I skipped most of the disconnecting steps due to people having issues with reconnecting and things not working. I only disconnected the track pad, and removed 3x screws on the logic board (One on the left, the battery connector and one on the right) which allowed me enough room to remove and fit the new pack.

Per Coconut Battery the new pack (amazon) was manufactured in 2018 (5 years ago) and was completely discharged when putting in to my 12". Therefore, the final step with the 5W connection took about 30 minutes until anything appeared on screen. Not sure how long the pack will last but it was also manufactured by "Simple", the same as the OEM pack.

Good luck with the adhesive and be careful with the ribbon cable! Thanks!

Rick -

I did the same thing with my 2015 Macbook, skipping almost half the steps listed above. Fortunately when I plugged in the laptop with the low voltage connection, it turned on right away and had 94% battery. We'll see what kind of life it has!

Preston -