Released April 2010 / 2.4, 2.53 GHz Core i5 or 2.66, 2.8 GHz Core i7 Processors

567 Questions View all

MacBook Pro not powering on, Magsafe LED not lit.

Macbook Pro 15 inch mid 2010 - model A1286

Laptop was in use when the fans spun high and the laptop blinked off. No longer powers on, thermal compound replaced every year, dust removed from heat sinks every 6 months.

No longer powers on means no longer powers on. questions about OS or does it boot to such and such are irrelevant and off topic to case in point. that being said, the battery has died of old age, shows the 5 seconds blink pattern for the first led in the battery indicator.(battery has been chemically dead for 5 months)

PMC reset does nothing(would not expect it to since the battery is dead)

when the poweradapter head is removed from the port, the battery indicator light performs the dead battery 5 second blinking. plugging the head back in results in no reaction.

the magsafe amber/green led's do nothing, they dont light up - no reaction.

with the magsafe head plugged into the power port, the dc board pins read 16.6V

a direct voltometer reading from the magsafe head reads .4v instead of 6.86v.

readings were taken following the pinout from

i do not have another macbook to test components with, i do not have another magsafe to perform tests with. the only way i can get a magsafe is buying one.

having such an abnormal reading from a no-load magsafe would indicate the answer right? if the magsafe has blown, what are the chances that the surge into the mac didnt damage something else as well?

i need confirmation that the symptoms are what i think they are, a blown magsafe.

Answered! View the answer I have this problem too

Is this a good question?

Score 0


The magsafe in question is the original that came with the macbook. the magsafe supplies 16v-18v. model is A1343


Add a comment
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12

1 Answer

Chosen Solution

Everything you said indicates a dead MagSafe adapter. If you know the battery is gone I'd replace it too.

Was this answer helpful?

Score 1


thank you! the client plans on replacing the battery at a later date.


Add a comment

Add your answer

Robert John Cronin will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 2

All Time: 2,353