Macbook A1534 820-00244 - 5V 0,2A

[obelix24]

Hi All,

i got one Macbook a1534 boardnumber 820-00244 that is taking only 5V 0,2A

I've tried to replace 3x CD3215B01 chip but it's still behaving same ....

On the board there was blown L4804 so i've replaced it.
when power is connected 5V 0,2A
PPBUS_G3H - 0V
PP20V_USBC_XA_VBUS_F - 5V

I've tried to remove F7040 as mentioned here
https://www.badcaps.net/forum/troubl...1534-820-00244

but there is still no Voltage on PPBUS_G3H line ...

I've checked and PPBUS_G3H is not shorted to ground ...

I've checked with thermal camera and nothing obvious ..

[mon2]

With no power to the board and F7040 removed, what is the exact resistance to ground of PPBUS_G3H ?

[obelix24]

and i forgot there is long screw damage see image.

Resistance to ground is in Mohms and falling down

[obelix24]

I mean resistance when fuse is removed

[kevingill]

What resistance to ground is on pin 1 of F7040 (PPVBAT_G3H_CHGR_REG)? Do you get a voltage on pin 1 of F7040?

[obelix24]

resistance to ground on PIN1 is 4,1Mohms (mega)
Resistance to ground on PIN2 is 5,7Mohms (mega)

In Diode mode (red on ground black on pin :

PIN1 : 0.624
PIN2 : 0.435

[obelix24]

Any idea ? Currently it's taking 5v 0a ... i'm out of idea what should i check ...