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Old 05-11-2016, 02:22 AM   #1
Pragmatiko
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Default Apple A1261 820-2262-A no power

Hello,
that Macbook is completly dead.
I have 3,3V on power button but when i press it the laptop wont turn on.
I tried to put to ground with twizeer pad On 3,3V but still nothing.

Could be a bios issue?

Someone have a bios dump?

Regards
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Old 05-11-2016, 07:52 AM   #2
Pragmatiko
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Default Re: Apple A1261 820-2262-A no power

Have 3,3V on power button and also have 3,3v and 5v on L7360 and L7320.

Have flashed bios with new one but still not turn on.

Any suggestment?
Attached Files
File Type: rar 820-2262-a bios.rar (1.27 MB, 169 views)
File Type: pdf Macbook m88 mbp17 schematics.pdf (1.96 MB, 199 views)
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Old 05-11-2016, 08:14 AM   #3
farooquepm
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Default Re: Apple A1261 820-2262-A no power

Quote:
Originally Posted by pragmatiko View Post
have 3,3v on power button and also have 3,3v and 5v on l7360 and l7320.

Have flashed bios with new one but still not turn on.

Any suggestment?

sir you need check 5.v and 3.v regulater mosfet ans primary ic
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Old 05-11-2016, 08:16 AM   #4
Pragmatiko
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Default Re: Apple A1261 820-2262-A no power

Quote:
Originally Posted by farooquepm View Post
sir you need check 5.v and 3.v regulater mosfet ans primary ic
Hello, 5 and 3 volt are ok.
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Old 05-12-2016, 05:32 AM   #5
Pragmatiko
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Default Re: Apple A1261 820-2262-A no power

someone can attach board view?
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Old 03-13-2017, 02:44 PM   #6
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Default Re: Apple A1261 820-2262-A no power

Quote:
Originally Posted by Pragmatiko View Post
someone can attach board view?
There you go!
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Old 03-13-2017, 02:59 PM   #7
ktmmotocross
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Default Re: Apple A1261 820-2262-A no power

did u have 3.425V from "G3HOT"? U7800



see this guy he is great in macbooks
https://www.youtube.com/user/rossmanngroup
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Old 06-10-2019, 04:25 AM   #8
ohuhohuhoh
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Default Re: Apple A1261 820-2262-A no power

Thanks OP
I have repair the Graphic Card and now there is no wifi and so sound. The boardview and schematic is very useful for me to check the PPVIN for those two IO
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Old 09-02-2019, 02:22 PM   #9
tipaaetaa
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Default Re: Apple A1261 820-2262-A no power

Thank! Now I signed up for this guy, he is really cool.
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