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Released October 24, 2011 / 2.2, 2.4, or 2.5 GHz Quad-core Intel Core i7 Processor

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Mac wont start up, both fans spin for 2 secs, Sleep LED blinks once

last 4 of serial # DV7L

When trying to power up with power button :

- Mac starts

- Both fans spin for 2 sec

- Sleep LED blinks once

- all shuts off, cycle repeats without pushing power button on

Battery indicator full. When I unplug battery with adapter attached, Mac wont react at all.

Tried different RAMs, HDDs, SSDs. Reseting SMC, NVRAM, 20sec battery unplug - no luck.

Any of you guys had smth similar with POST ?

Answer this question I have this problem too

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Does the logic board show any signs of liquid damage?

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Most Helpful Answer

Disconnect the mag-safe, disconnect the battery. Press and hold the power button for 10 seconds. Reconnect battery, reconnect mag-safe and tell us if it booted.

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Tried it, disconnected Magsafe and battery, pwr button hold for 10sec. Reconnected Magsafe - fans spin instantly without pushing pwr button on. Pushing power button on, doesn't change anything.

No liquid damage visible.

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It should have restarted spontaneously after doing that. Your repeated procedure is NOT the sequence I told you (what about the battery)?

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tried it now, exactly as you suggested - no changes

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I am at a loss on this one. I have never seen one that wouldn't boot with this method that didn't have liquid damage. Sorry, maybe @danj has an idea.

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Hubert H. will be eternally grateful.
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