Dump request - 820-3476-A "Core i5" 2.8 Ghz


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1 year 10 months ago #9050 by Mario
That doesn't work. What is defective to the original?

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1 year 10 months ago #9051 by Andrew_Leon
I ordered a chip with a bios on the ebay and counted it as a programmer, on this dump my emc2785 i5 2.8Ghz works fine, before it hung on an apple

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1 year 10 months ago #9053 by Andrew_Leon
I I solved the problem with the serialist now the macbook works fine

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1 year 10 months ago #9054 by guruji
i used the above dump but the machine comes on for a while and then shutsoff no display.which serilizer did you use.
thanks

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1 year 10 months ago #9058 by guruji
hi the bios posted from ebay is a good one no problem but strange i put it the machine it does not work fan spins for a sec and goes off.my question is is it possible that we have tried so many bioses and can the intel cpu get corrupted as only 3 bios work out of 20.but the all bios work in another board with no issues. so in short has intel me locked the processor to work.

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1 year 10 months ago #9059 by Andrew_Leon
no no no bro, it's impossible. I've posted an absolutely working dump that has not been edited by me, if you have MGX92LL, then it should work fine or you have hardware problems, maybe the efi chip dies

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1 year 10 months ago #9061 by KingBonecrusher
If you replace the bios chip itself you need to set the qbit in winbond chips!

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1 year 2 weeks ago #10538 by Nemskiller
Hello to the team.

I have a 820-3476-A 2,4Ghz that is bootlooping and don't respond to keyboard cmd alt p r or smc reset.
I've took bios that i can find on the web, cleaned the ME region, change the serial number.

I get some results like : cmd alt p r works, but i get no screen... no system booting up...

You have my original bios in attachement.

Can you help me for having a good dump ?
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