MacBook not starting at all

Question

MacBook Pro 15インチ Unibody 2.53 GHz Mid 2009

2009年6月発売/ 2.53 GHz Core 2 デュオプロセッサ

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Kein Name @keinname

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投稿日: 2019年10月9日

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MacBook not starting at all

So my MBP was always working perfectly until I turned on my washing mashine in the same electric circuit. Then the breaker had popped and I had to put it back in.

However my desktop computer is worked fine after an hour snd my MBP does not power up since then at all. There is just nothing happening…

The green light from the MagSafe is working and the battery seems to be charged (indicator at the left side shows 5 of 5 green LEDs).

Any suggestions? Is there maybe some sort of overvoltage protection which I could reset or replace?

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Dan @danj

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投稿日: 2019年10月9日

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Not good ;-{

Your logic board got hit by a ground loop condition. Basically a surge traveled up to the system from either the charger (3rd party) or one of your other connections (USB, FireWire or Ethernet connection).

Lets try this Hail-Mary - Disconnect the charger and other connections, then the battery internally, press and hold the power button for a good minute. Now plug in your battery and MagSafe charger. Now press the power button any reaction?

Follow these steps: MacBook Pro 15" Unibody 2.53 GHz Mid 2009のバッテリーの交換

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Thank you but nothing happens still. If your assumption is right, which parts need to be replaced?

Kein Name さんによる2019年10月9日

Try with the battery unplugged then plug the charger in. The MacBook should turn on by itself.

If it does then we may just have a bad battery here.

Ben さんによる2019年10月9日

@benjamen50 - Both indicators (charger & battery) here are showing power.

I doubt the battery is the issue on why the system is not starting up. Yes, the battery likely needs to be replaced given the systems age. But, it should at least startup at this point.

'The green light from the MagSafe is working and the battery seems to be charged (indicator at the left side shows 5 of 5 green LEDs')"

Dan さんによる2019年10月10日

With removed battery the system does not start with the magsafe plugged in.

Kein Name さんによる2019年10月10日

That only happens with the MacBook Air's or newer retina models. The Unibodies need the battery. Sorry I forgot to correct that.

Dan さんによる2019年10月10日

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Thank you but nothing happens still. If your assumption is right, which parts need to be replaced? — Kein Name
Try with the battery unplugged then plug the charger in. The MacBook should turn on by itself.

If it does then we may just have a bad battery here. — Ben
@benjamen50 - Both indicators (charger & battery) here are showing power.

I doubt the battery is the issue on why the system is not starting up. Yes, the battery likely needs to be replaced given the systems age. But, it should at least startup at this point.

'The green light from the MagSafe is working and the battery seems to be charged (indicator at the left side shows 5 of 5 green LEDs')" — Dan
With removed battery the system does not start with the magsafe plugged in. — Kein Name
That only happens with the MacBook Air's or newer retina models. The Unibodies need the battery. Sorry I forgot to correct that. — Dan

MacBook Pro 15インチ Unibody 2.53 GHz Mid 2009

MacBook not starting at all

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