So, where did you forcefully plug the jack? The USB, the SATA or in the charger port? In the usb or sata it could have damaged the ports but i don't think it would break the laptop, and if it was in the charger port then you could have jumped it an made a short circuit that well, could be the cause of that the laptop doesnt turn on. Did the laptop went off right away when you plugged the headphones wrong?