Macbook Pro A1708 820-00840-a

[fixer_pl]

Hallo,
I've got a problem with motherboard 820-00840-a.
With plugged battery PPBUS_G3H is 11.7V.
With only DC-Board connect PPBUS is 0.02V
The resistance of PPBUS_G3H is 70kOhms and growing up.
I checked voltage PP20V_USBC_XB_VBUS and there is 5.25V and not going to 20V.
PPDCIN_G3H is 5.25V
PP3V3_G3H_UPC_XB is 3.3V
D6905:
PIN1:0.1V
PIN2:5.25V
PIN3:4.95V
L7030 has 1.45 Mohms.

I can't find a problem...
Anyone can help me?

[piernov]

Re: Macbook Pro A1708 820-00840-a

History? PP3V3_G3H?

[fixer_pl]

Re: Macbook Pro A1708 820-00840-a

PP3V3_G3H is 3.3V


At the beginning, macbook started shutting down after some time of using.
And now he wake up sometimes but for few minutes he dies again.
When he turning off, CPU is working, 3.3V and 5V converter is working too but there is no voltage on Backlight coil (L8410) and charging coil (L7030) but PPBUS_G3H is 11V.
After disconnect the battery PPBUS_G3H is almost 0V.

[fixer_pl]

Re: Macbook Pro A1708 820-00840-a

But its weird cause with connected battery it was charged.

[MaxPower666]

Re: Macbook Pro A1708 820-00840-a

After disconnect the battery PPBUS_G3H is almost 0V.

check U7000 or U7100 this is the chip that make the PPBUS.