No power on, no boot

Question

MacBook Pro 15" Unibody Mid 2012

2012년 6월 출시 / Core i7 프로세서 Turbo Boost 포함 / 최대 1 GB DDR5 비디오 RAM

596 질문 전체 보기

TheBuccaneerGentleman @thebuccane23216

평판: 11

게시일: 2023년 9월 18일

옵션

No power on, no boot

Hello! I have a 2012 15” Unibody MacBook Pro that I have had since new named Grandpa. So yesterday I was trying a seam game (Timberborn), and he got really hot and shutdown unexpectedly. I thought Grandpa just needed a nap. Now about a week later I get no boot. No power on. Nothing. The MagSafe light shows green but the battery doesn’t charge (it’s a replacement from about 4 years ago). Things I’ve tried:

SMC reset doesn’t help.
Disconnecting the battery internally and trying to boot.
Disconnecting the keyboard and bridging the pads above the keyboard connector.
Checking all internal cables.
Playing with installed RAM (switching slots, removing sticks)

Anything else to try?

Thank you!

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요

점수 0

댓글 달기

답변 1개

선택된 답변

Dan @danj

평판: 479.4k

Self employed contract worker

35

329

971

게시일: 2023년 9월 18일

옵션

Disconnect the battery again, now with nothing else connected, press an hold the power button for a good 15secs to fully discharge the logic board. Now only reconnect the MagSafe the system should spontaneously start. Let it finish the bootup and do a proper shutdown reconnect things that should get you going but there is still the need for a new battery.

해당 답변은 도움이 되었습니까?

예 아니요

점수 1

댓글 3개:

Just to confirm… “nothing esp connected” means no external devices? Sorry the ignorance.

TheBuccaneerGentleman 의 2023년 9월 18일

Hello Dan. So I tried that. Disconnected the battery and MagSafe. Held the power button for a good long time (about 30 seconds) and reconnected MagSafe. Then I pressed the power button as normal and still nothing. I even held the power button for 10 seconds and nothing.

I tried once more to discharge the logic board but waited a minute before connecting MagSafe again. Still nothing.

Thank you so so so much for your help!!!

TheBuccaneerGentleman 의 2023년 9월 18일

@thebuccane23216 - Yes sorry typo still sucking down my first cup of morning Joe.

Not good! This looks like a logic board failure which will need someone with deeper skills to diagnose. If you take the logic board fully out and inspect it I think you'll find a either corrosion or capacitor damage.

Dan 의 2023년 9월 18일

댓글 달기

Just to confirm… “nothing esp connected” means no external devices? Sorry the ignorance. — TheBuccaneerGentleman
Hello Dan. So I tried that. Disconnected the battery and MagSafe. Held the power button for a good long time (about 30 seconds) and reconnected MagSafe. Then I pressed the power button as normal and still nothing. I even held the power button for 10 seconds and nothing.

I tried once more to discharge the logic board but waited a minute before connecting MagSafe again. Still nothing.

Thank you so so so much for your help!!! — TheBuccaneerGentleman
@thebuccane23216 - Yes sorry typo still sucking down my first cup of morning Joe.

Not good! This looks like a logic board failure which will need someone with deeper skills to diagnose. If you take the logic board fully out and inspect it I think you'll find a either corrosion or capacitor damage. — Dan

MacBook Pro 15" Unibody Mid 2012

No power on, no boot

답변 1개

귀하의 답변을 추가하세요