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Modèle A1278 mi-2010 / processeur core 2 Duo à 2.4 ou 2.66 GHz

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My MacBook Pro will not start even in safe mode

Hi,

My MacBook suddenly turned off. I couldn’t restart and saw that the power chord was frayed. Used another chord but when I pushed the start button, the green light would go off, no sound. Tried PRAM sequence and seem to start (gong) then turn off. Meanwhile, I had a CD which I needed to retrieve so I opened the back, took it out but in the process the subwoofer connector socket came off as I tried to unplug.

I removed the memory (both-same time), restarted with the PRAM sequence and heard the fan running, no gong, and a black screen.

Questions:

1. Can I diagnose with the plug issue?

2. Where do I start to look into the real issue?

Thanks for the help

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Before trying to replace or even diagnose an issue with the magsafe connector, I would try doing an SMC reset by holding down Shift + Ctrl + Option and then pressing the power button for a second or two. This may fix the problem, but I can’t guarantee it.

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Hi Alec,

Thanks for answering my question. I will try that.

par

nothing, no response or blinking lights...

par

One thing I forgot to mention is that I don't have a battery. It bulged and never replaced it.

par

reconnected the MagSafe connector, green light turned on and did the SMC reset but no response. Pressed the power button by itself and started got a blank screen for a second and then the computer shut off. Greenlight on the mag safe connector went off and hasn't come back up even though I plugged and unplugged it.

par

Having no battery requires a special start up method that you might have to try.

Here's the link to how to do it: http://osxdaily.com/2019/06/14/how-boot-...

par

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Alex Blanco sera éternellement reconnaissant.
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