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Its a 820-00850-A

Hello , I got this Macbook A1989 was previously water damaged and was repaired by me , last week the owner brought it saying that its not charging and not booting , so I have checked it and on my AMP meter i am getting 5.09V , 1.01 watts and 0.20 amps . So I proceeded to open it and take...

I was able to get a hold of the passcode and indeed the system is saying that the battery needs replacement , therefore I informed the customer and he stated Yes he s well aware of that so i am getting a new replacement battery to complete the repair process, Thank you so very much .

Now I just shut the macbook down and I disconnected the USB charger, the battery is charged at 69% but as soon as i power it on without the USB charger connected , it boots half way with the apple logo than power off , then when i press the power button it would ask me to connect the charger...

Ok, sometimes I realize that some of the chips pulled off the donors are not 100% working that was why I said that, but so far the macbook is charging but i am still skeptical as its pulling 20,39 watts now and 0.95 amps but battery is half way charged. I tried to disconnect the charger and...

Ok I Took notes , I will start working on that thank you so much for the infos.

I don't have one here with me , I will have to order one , I am not that familiar with them , Maybe i would need to replace back the Q7030 And Q7040 To their original ones , Would you suggest that?

It really Is , I am keeping an eye on it to see if There will be any side affects it shows that it is charging but not showing the battery percentage as customer did not provide the password to unlock it .So let's keep an eye on it , I think some of those issues can also be detected via...

Sorry for so much of typos , I meant in every step of the way , my apologies .

A very quick update , I think that i got the issue figured out , What I did at last i used my thermal imager to scan anything for short , and i found right next to U2800 right above it which is not even mention on the schematics neither the board view but the Markings on that chip is PI3U5B32...

Yes correct

Ok, I checked PPBUS_G3H voltage with Battery and charger connected and i got = 0.879 , and PP3V3_G3H = 3.373

Yes , I did Replace U7000 and the behavior remained the same . I have asked you an idea regarding the original U7000 chip with the marking 9239HI and the one I purchased 9239CO if they make a difference , I have also reballed 3 different U7000 from donor boards and no luck at all, I got the new...

I have taken my time to check entirely all the power lines of U7000 from a known good board to compare with the one that i am repairing ,this is a very small report of the lines that i found in diode mode too low and some others too high TBA_GATE Q4 on the good board I have in diode mode 0.750...

I have a few here I believed that I got them from Rossmangroupstore , but they are 9239CO but the original one on the board is 9239HI would they work the same?

SMBUS_BATT_SCL =0.390 SMBUS_BATT_SDA = 0.391

PPBUS-G3H in reverse mode promptly goes to 1.989 then changed to OL , Let me check SCL/SDA lines of battery bus.

Ok , I agree , Let me do that , I do not touch the USB-C area at all .

I have changed Q7030/Q7040 to newer ones but still not ok , but there s something that i found here , I have another known good board that i am comparing the values with , on my know good board PPBUS_G3H resistance value in diode is is 0.287ohms and on the board that i am trying to repair...

Ok , Then You suggest that I change Q7030/Q7040 which I did last night both of them just to see if the behaviour would change but the result remained the same I am not too sure if U7000 is my culprit , I was going to simply remove it by a new one to see if I get a boot , let me know if you...