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Black Screen totally unresponsive MacBook Pro

Hi all.

I have a Mid 2014 15 inch Macbook Pro.

Today I left for while with the computer plugged in and the lid open. When I got back home and tried to log back in I noticed it took some time for the computer to display the login screen. Actually I had to press a few buttons and the trackpad quite a few times to get there.

Once I was able to see the login screen I noticed that the battery indicator displayed only 1% of battery although the computer was plugged in for a while. The magsafe 2 had the red light as if it were charging.

When I logged in i immediately went to the battery indicator to see what was going on and it displayed "Plugged in, not charging" and that the power source was the power adapter.

Just a few seconds after this the screen went black again, as it was when I arrived (I have the Google Hot Trends screensaver so that was odd the first time). Again I started to press keys (Esc, Power, Enter) and the trackpad untill I saw the login screen. This time the battery indicated 100% charge, but there was still a red light on the Magsafe 2. I logged in again, but immediately after that the screen went black agin.

After that I could not get into the login screen so I started with the suggestions online. I did an SMC reset both with the adapter plugged in and unplugged, but still could not get to the login screen again. I used the kay combination to reset NVRAM but it was clearly impossible it would work since there is absolutely no response from the computer, no chime, no lights, no noises, no video, nothing.

Just once I could get back to the login screen, but again that was only a few seconds and went back to black again. Since this last time I've reet SMC a few times and tried everything mentioned in forums. I've pressed absolutely all the keys in the computer and nothing happens.

I don't know what to do now, the computer is absolutely unresponsive, there is no sign at all of activity, except when resetting SMC with the power adapter plugged in, which turns off and on the magsafe 2 light.

Thanks for any help you can give me.

Regards

Eduardo

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So this computer has no Eternal Display when plugged into a TV or Display? Sounds like it could be either the Battery causing the computer to act in a sporadic way causing the computer to not get power at times and show some at others. Honestly it also sounds like a Logic Board issue but there are so many things something like this could be you would have to take the bottom case off to be able to gain access to the inside of the computer to go further into diagnosing this issue. If your able to get inside the computer I would start by unplugging the Battery and hooking the Charger up to it to see if it will gain you power if it does then you know you have a Battery thats causing issues with Power to your computer. The next step I would take would be to unplug the KeyBoard TrackPad connectors to see if you have a short in your KeyBoard although that doesn't sound it at all its still worth a try. Theres a procedure here. MacBook Pro 15" Retina Display Mid 2014

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Hi Daniel. Thanks a lot for your answer. I don't have a pentalobe screwdriver, but I borrowed one a while ago and could test the battery. The voltage is ok and it does provide current. Also the computer did not turn on with the power adapter only, so I assume the battery is not the problem here.

Keyboard seems to work fine because the SMC reset combination makes the Magsafe 2 reset it's connection.

I hope it is not the Logic board, but if it was, wouldn't it be a big coincidence to have seen a problem with the battery first and then a Logic board failure?

Could it be the firmware that handles battery charging? If it was I don't get why an SMC reset doesn't do the trick.

Any ideas?

Regards

by

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Okay. So I managed to get the computer working, but there's still something going on with the battery charging. I can't exactly describe how this was done so I'll try to describe what I did.

I left the computer charging with the lid closed overnight. In the morning the light on the Magsafe 2 was still red, so I assumed nothing happened. I tried again everything I did the day before with no luck. I finally closed the lid and left the computer closed and unplugged for a few hours. Then just before removing the drive to back it up and send it to Apple (I'm in Argentina so that's quite a long way) I decided to give it a last try. With the computer disconnected I pressed the power button and got the low battery icon! This meant that obviously the screen was working and so was the LogicBoard apparently. I connected the computer and I could power it on. It eventually started charging. I had of course 0 mAh in the battery.

Now after a full day of working and eventually getting the battery to reach 100% I disconnected the comuter. That went ok, it worked with the battery. But when I plugged it back in it it came up again as "Battery Is Not Charging".

I will retry an SMC reset and NVRAM reset, but I think it might need technical service from Apple.

Regards

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Eduardo Metzger will be eternally grateful.
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