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2.4GHz, 2.7GHz, or 2.8GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache. Released February 2013.

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I cannot start my Laptop

Hello !

I have MacBook Pro Retina model A1398 2.7Ghz ,It was working perfectly until few days ago when after I power on and when open browser, without any other sign went OFF. Charger showing green light (battery full) but I cannot star laptop with connected AC supply as well as when computer is only on battery ,

Thanks for the help in advance !!!

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Let’s give this a try, disconnect the battery again and with nothing connected press and hold the power button for a good 15secs to discharge the logic board fully, this will reset SMC if it was latched. Now plug in the MagSafe the system should spontaneously restart, let it full boot and do a proper shutdown.

If that fails your logic board needs repairs or replacement. You’ll need to pull it out to inspect it for damaged components. Post a few picks if you find a problem, one close and in focus one more so we can identify the area.

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