u/mikehamp

Very strange thing on the vaio vjs142. It is older but I have it hooked to external monitor sending power via USB-C PD and also the ac-dc adaptor. It charges battery and stays charged sometimes a few days but then hits a state where it starts to discharge the battery toward 0%...it keeps saying plugged in but as it gets to 5%, etc.. windows says battery almost out, plug in. it is plugged in. what is going on? why is it showing both plugged in, not charging, not running on outlet power? I tried without usb-c, without dc-in, but it just keeps discharging slowly and turns off. is the ac adaptor or the power circuit, or the battery defective?