Macbook A2141 820-01700 Stuck at Charging Sign

[Instafixx]

For My Reference : AZSHM 2

20V at Amp-Meter and current draw is at 2.1 mAmps. I get charging sign on the screen. But it is like that for 1 hour using a 96W charger.
Without Battery it wont turn on.

When idle - 0 AMPs draw.
when click the mouse key it goes upto amps.

Tried DFU Revive. Successful Revive but no result.

 

[2informaticos]

Any history available?

"Without Battery it wont turn on"
So it turns on with charger and battery?
Or just shows the charging logo?

 

[Instafixx]

So the customer sent to me that it was working only on charge and not charging the battery.
When it came to me the battery had dried up maybe. So i only get the charging logo.

Wont Turn on

 

[2informaticos]

Getting charging logo, means the machine is turned on.
Do you know other way to get image on it???
Now you must find why doesn't go ahead to boot properly.

Is the charger 96W for sure?
Test another charger cable too.

If there is data to save, can be done in DFU mode; authorized Apple workshop can do it.
After that try DFU restore.

 

[Instafixx]

Tried Different Cable. Charger is 96W for sure.
This model boots up without battery connected ??

Performed a Successful DFU Restore.
What should be the current draw in the idle state.
Its 20V 0.030 Amps.

Upon Clicking the TrackPad it goes upto 1.5 Amps - Backlight Gets on and i see the charging logo.

 

[Instafixx]

Just spoke to the customer. He said he had been using it for a year on the adapter alone.
Battery used to show 1% as per him and he used to use always when charger plugged in.

 

[Instafixx]

SYS_DETECT is 2.7 Diode Mode Reading.
PP3v3_g3h_rtc_x is 0.150.

Removed R6955.
SYS_DETECT is OL
Now PP3V3_G3H_RTC_X is .325

Replaced R6955.
Value flucatates between 0.400 to 0.100 at different times but the voltage is 3.3V constant
i2C SDA/SCL is 1.8V

 

[Instafixx]

At 20V and0.00 AMP Draw
Coils around U7800
L7813 is 1.8V
L7817 is 0V
L7816 is 0V
L7814/15 is 1.1V
L7806 is 0V
L7811/10 is 0V

P.s These railes have voltages when there is current draw. Something is pulling the current down

Diode Moe Readings seem okay as per open board data.

Even the SSD rails drop down to 0V.

 

[2informaticos]

Test with known good battery.

 

[Instafixx]

Shouldnt this machine boot up without a battery ??

 

[2informaticos]

It should boot without battery.

 

[Instafixx]

Tried with another battery . it Worked. But weird its not getting on withour battery

 

[2informaticos]

Does it charge the battery now?

 

[Instafixx]

No. Not the old one.
It charges the new one