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Early 2011 Model: A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor

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MacBook Pro in security mode (shut down)

Hey there !

This may sound like a sad joke but this actually happened to me. You have the right to laugh as loudly as you want as long as you give me some help :-p

Last week my cat was sick, his nose was spilling a fat clear liquid almost everywhere in my house. The problem is that he decided to sleep on my laptop...

Now when the computer boots, the fan is enabled even before I can see the white screen. It starts loading my system and then shuts down. It won't boot again unless I remove the battery connector and put it back in again.

Also when I plug the battery charger in, the led lights up very very weakly so I guess that something's going wrong here too but i'd like to fix the 1st problem 1st :)

I guess that there is some matter on a sensor which leads the computer to turn into security mode. May you help me figuring out whats going on ? As long as it turns on, i suppose that it's only a sensor problem but i don't know where they are located so I can't clean it yet...

Thanks in advance !

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Vincent Monteil, first concern is that your cat is okay. Second have you opened up your computer and cleaned the logic board and the DC-In board?

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Not yet. Is it OK with 90° alcohol ? Would you please mind giving me links to access those parts ?

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Yes, 90%+ isopropyl alcohol will be okay. Here is the link for the DC-in board.MacBook Pro 13" Unibody Early 2011 MagSafe DC-In Board Replacement Cat ok?

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Thanks! I'll give it a try and give you a feedback :)

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Put a heating pad in your cats bed, that's probably why he picked it to sleep on. Sounds like he also marked it and shorted out the keyboard.

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My unibody macbook 13" late 2008 keyboard was spoiled with water for a while. Result was a failure of a part of the keyboard. After securely drying and cleaning most of the keys started working again except 1 key >> the left shift-key stays permanently in Uppercase mode and isn't working anymore. This failure resulted in booting only in security mode (holding down the shift-key forces a Mac to boot up in security mode!). To bypass this and boot in normal mode I have to hold down the esc-key during start up until apple logo shows up. With KeyRemap utility I have to disable the left-shift key in order eliminate Uppercase. In my case the security boot is a keyboard problem.

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Do you have a link to this utility?

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Vincent Monteil zal eeuwig dankbaar zijn.
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