Hi, I have a big problem with the notebook in question, basically if I have to recharge the battery, the notebook sporadically and suddenly turns off and then back on! I tested the power supply and has no problems, I also tried with other power supplies of the same type and there is always that problem! How could intervene on the motherboard? I noticed the service manual that there is a component for charging precisely the "bq24721c" could depend on it? how can I test it? thanks, I await answers!