[SOLVED]820-3435 no power/dim green light

[elcapitan]

Hello, I have a 820-3435 that came in with no power. It was missing PPBUS_G3H (0v). After replacing ISL6259 I was able to get a dim green light but still no power. PPBUS_G3H is still missing. any suggestions? Im stuck

Thanks,

 

[larossmann]

1) Is PP3V42_G3H present?
2) What is the resistance to ground on PPBUS_G3H?
3) What is the resistance between pins 17/18 of U7100?
4) What is the resistance between pins 27/28 of U7100?

 

[elcapitan]

1) 3.42v
2) 101.2 Kilo Ohms
3) 4.9 Ohms
4) 12.05 Mega Ohms

 

[dukefawks]

And what should the resistance be between pins 27/28?

 

[elcapitan]

It should be 20 Oms. I got correct reading after replacing the current sense resistors.

R7005 was bad. I was only getting 1.73v on CHGR_DCIN. I replaced it with a donor and got a working macbook

You can close this post. Thanks!