Notebook does not start with battery?

Notebook starts only with power pack battery New and full but can't start with battery.

Yes, I already had.

Maybe the battery is broken… And NO, new is no reason.

Is that the battery when you have started your notebook and then disconnect the power supply?

Nee battery OK has been tested. As soon as the power supply unit is removed, the notebook goes off. Suspected that the power socket is defective.

Why the power socket?

Would go more in the direction of AKKU. Voltage output control.

Or also voltage regulator on the motherboard.

Hard to say