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I get PLT_RESET_L (3.35V)

Thank you again for your reply :-) I dont't get PP5VR3V3_SW_LCD in the first few seconds - just checked it with an oscilloscope. I get the 5V suplly on USB but no activity. And no external display. So the problem is not the missing lcd rail - it's another S0 that holds off the board from...

Thank you for your reply and your advice! I checked U7600: Pin 3: 3.3V Pin 13: 5.18V Pin 14: 5.17V Seems to be normal? Has enable Signal and gets Voltage. I get 1.81V at L7720 and 1.52V at L7330.

Thank you for your reply. Maybe some context is needed: When I received the MacBook it failed to start (3x beeping) so I decided to reflow the RAM chips (because it also crashed on Memory Test). After reflowing it started but threw kernel panic after some minutes. So I decided to remove the...

Hallo everybody, I got another problem with a MacbookAir (820-3032-A). Is seems to get in S0 state (taking 300 mA) but not powering on. I noticed that ALL_SYS_PWRGD is missing so i checked the needed rails and found PP1V05_S0 beeing low (0.22V). So I checked where PP1V05_S0 (resp...

Hi everyone, I stuck in a MacBook Pro repair (820-4924-A). The MacBook is powering on (fanspin, CPU gets warm) but i get no display. So i started checking the LCD power rails and noticed that PP5VR3V3_SW_LCD is missing (0V) (LCD connector pins 28,29,30). Here I stuck because of missing...

Hi, i want to replace the RAM of a A1269 from 2010. I already unsoldered the old chips. I want to replace them with some chips soldered on a ddr3 sodimm ram stick. Are there any restrictions (except of frequency) or can I just take any RAM? Thank yo Best regards

I did retry the whole thing with 0.9V (resultuing in 4,98A with amp limit at max). Same results regarding to the temperature evolution as in my post#9. :unsure: Already ordered a new PSU with higher amp limits :)

How would the CPU behave if there are just some faulty solder-balls on the BGA-Chip, shorting the surrounding pins to ground. Would the CPU even get hot in this case?

SO I just did some more detailled research about the temperature: Initial temperature: 21°C After 60s: 24°C 120s: 26°C 180s: 26°C 240s: 26°C 300s: 26°C Seems to stay at 26°C. I didnt' reflow it. Don't know if someone else did. But it doesn't look like... the...

Yes, it's a 5A model. Could get up to 1.1V (5.1A) - same result here.

I just injected 0.8V (>3A) on the pin 2 of L7960 - but nothing was really heating up... I'm confused. The CPU seemed to get slightly warm after some minutes but not hot...

Hi, thank you for your reply! The short remains on pin 2 (Net PPVCCIO_S0G). Hope its not a faulty CPU?! :(

Hello everybody, I'm very new in rapairing boards. Just started some weeks ago with some old (2009 - 2011) MacBooks, which I could repair with help of the YouTube channel of Louis Rossmann (Thank You very much at this point ;) ) . Now I tried something newer and more expensive :-D A MacBook...