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(Redirected) Plugged in, Charging but not Charging

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(Redirected) Plugged in, Charging but not Charging

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My dell Inspiron 3420 bios version A09 suddenly stopped charging battery , and the power icon show this message(Plugged in and charging) but my battery does not charge.

I tested another charger and another battery but did not help.

Thinking that changing bios might  help,I am trying to change the bios but can't downgrade even i tried /forceit command. 

I can access logic board if for troubleshooting someone could educate me about  voltages of sda, scl and dc jack connector to the board.

Kindly help me.

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