Re: MacBook Pro 820-00239 not turning on

Thanks for all your help!
I've order a donor board and will try to replace the missing U7900 and see if it makes any difference.

Re: MacBook Pro 820-00239 not turning on

Measured some voltages now:

PPBUS_G3H: 13.05v
PP3V3_G3H: 3.35v

PP5V_S5: 5.12v
PP3V3_S5: 3.34v

PP1V8_S4: 1.79v
PP3V3_S4: 3.34v
PP5V_S4: 5.12v

PP1V0_S3: 0v
PP1V2_S3: 0v
PP1V8_S3: 0v

PP1V8_S0: 0.015v
PP3V3_S0: 3.34v
PP5V_S0: 5.14v

SMC_PM_G2_EN: 3.34v

PM_SLP_S5_L: 3.34v
PM_SLP_S4_L: 3.33v
PM_SLP_S3_L: 3.33v

* Still missing all S3 rails but some of the S0 rails are present
* Just...

Re: MacBook Pro 820-00239 not turning on

Will re-verify today all rails.
Still waiting for my USB-C amp meter to arrive, will post results as soon as I get it.

Thanks!

Hi all,

I got a MacBook Pro A1706 (820-00239) with no liquid damage, just suddenly stopped working and is not turning on. Before sending it to a local repair shop, I saw there was a short on PPBUS_G3H but couldn't identify the problem.

Machine was back last week from the shop, with a fixed PPBUS_G3H (no short, correct voltage) but said they couldn't fix it because the "CPU is probably dead".

After checking it again myself, I'm not sure how they've reached their conclusion since all S3 rails are missing.

So, to conclude:...

Re: New Members - please post your introductions here

Hi There! I'm Nadav, EE, passionate about electronics
My MacBook Pro died, trying now to fix it by myself with the help of this amazing forum.

Thanks!