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dukefawks Do you think i need order another one for make sure is a cable problem?

Update: Just tested with another keyboard and cable/trackpad and i still don't get nothing. Merry Christmas

dukefawks, i forget to mention, but i get that measurements without keyboard and trackpad.

- I used the external apple keyboard, but doesn't work. - I get light on the mouse - When i get the OS, the mouse move very slow and sometimes doesn't work. - The logic board don't have any liquid indication. - The area of U4801 is clean as well J4813 (measurements without keyboard and...

Copy and paste :)

I don't know about that before, that's why we are here - to share. ?️

https://www.apple.com/support/macbookpro-videoissues/ Apple has determined that a small percentage of MacBook Pro systems may exhibit distorted video, no video, or unexpected system restarts. These MacBook Pro systems were sold between February 2011 and December 2013. Apple or an Apple...

Thank you, aprendiz

Guys, 820-2915-B I just tested with ASD (picture attached) in EFI and passed, however if I try test with OS, I dont get nothing, just gray screen. This happen if I try boot with external and internal hard drive as well. Did you guys have any idea what could be in this case? thank you

Thank you jessa and larossmann

I fixed more then 15 boards after i get a training with larossmann a 8 months ago. Before i just watch his videos and try understand how this things works. Here i am, learn by watch another post, bc is impossible learn something with your "engineer mood". That's why you think i don't learn, sorry.

External keyboard

larossmann I'm here to learn, not to be insulted.

Q7221 2 - 3.4 (p5vs_en_l) 3 - 0.72 (p3v3s5_entrip) 5 - 0 (p3v3s5_en_l) 6 - 0 p5vs_entrip That's means right to you?

The bios is not original. Someone replaced that.

Ok. What is the next step? If U7200 works fine, means i do a good job (soldering). Can u guide me?

R7260 - 0.5 Ω (looks ok to me), If i get OL, just replaced i probably get this board back. But that't not the case.

Short to ground on Q7221: Pin 2 - -1.200 MΩ Pin 3 - 75 kΩ Pin 5 - 1.600 MΩ Pin 6 - 88 kΩ

Q7221 2 - 3.4 (p5vs_en_l) 3 - 0.72 (p3v3s5_entrip) 5 - 0 (p3v3s5_en_l) 6 - 0 p5vs_entrip

dukefawks I just soldering i new one U7200 Pin 3 = 2v Pin 4 = 3.3V pin 5 = 2.1v Pin 6 = 0.72 pin 7 = 0 Pin 8 = 3,3v Pin 9 = 4.56v ?? Pin 10 = 3.4 Pin 11 = 3.4 12 = 0.97v 13 = 3.4v 14 =2V 16 = 12V 17 = 5v 19 = 0 20 = 0 21 = 0 22 = 4.56v 23 =0 24 = 0