Macbook A1398 Charging issue

[sourcensolutionsonline@gm]

Hello,

I got this Macbook A1398 820-00163-A came in with charging issue , I have founds a short PPDCIN_G3H_CHGR , I proceeded to replace Q7130 AND Q7135 As well as R7120 and U7100 to rule out the overall issue then short was gone , but now i am having issues , its only charging when screen is on , but as soon as it goes to sleep mode , its not charging but the orange light is still present and also while the charger is plugged anytime we open a website or trying to do something , it would charge and cut off then restart charging again but as soon as it goes sleep mode it would not stop charging immediately . Can i get some ideas please ?

Thank you

 

[2informaticos]

What is the exact PPBUS_G3H voltage, w/ and w/o battery connected?

 

[sourcensolutionsonline@gm]

With Battery Connected i am getting 11.74V

and without the battery connected i am getting 18.74V

 

[2informaticos]

Q7130 is shorted, change it.
Be sure C7125 is good.

 

[sourcensolutionsonline@gm]

Ok , I will go ahead and change it, but i had changed it too , so i will also change C7125 and test it again . R7120 gets really hot too.

 

[2informaticos]

May need to change U7100 at same time...

 

[sourcensolutionsonline@gm]

I changed Q7130 but the behavior is still the same as soon as computer goes to sleep it stopped charging, another thing is, it's asking for software update would that have anything to do with that as well , also U7100 Was changed twice by good quality ones , should i change it again?

 

[2informaticos]

"What is the exact PPBUS_G3H voltage, w/ and w/o battery connected?"
Changing something without checking the effect, doesn't help...

 

[sourcensolutionsonline@gm]

PPBUS_G3H With Battery connected 12.74 V
PPBUS_G3H Without Battery Connected 18.74

So i am not seeing much changes. I don't have another good working board to compare those values , by any chance would you happen to have any charts of the correct value when everything is working properly?

Please advice

 

[2informaticos]

Q7130 is shorted.
Do you see any other reason to have exact the same voltage on its input/output pins???

I don't know what you do there.
If Q7130 is correctly soldered, or may have some broken trace.
Is not normal to get burnt, once changed with new/good one.
Check continuity from Q7130 to U7100.

 

[sourcensolutionsonline@gm]

I can see that all the pads are normal and no broken traces I Wonder why it would do that too, I will see if i can get other Q7130 from other donors .

 

[2informaticos]

Did you check continuity from all Q7130 pads to U7100?

 

[sourcensolutionsonline@gm]

Yes , I did and yes there is continuity .

 

[2informaticos]

Did you solder Q7130 correctly?
Shouldn't get burnt so easy, once replaced.
Unless broken trace to its pin 4, or C7125.

 

[sourcensolutionsonline@gm]

I did replace C7125 , I think something from the inner layer .