Hi, can you help me identify what's wrong with my laptop? It crashes when unplugged, I can use my laptop for a short moment then suddenly I can't move the pointer and the screen seems frozen. Most of the time when it is plugged, I thought everything will be smooth but then it will freeze again especially when I'm watching videos. I really need this laptop but I don't have money to check it up. I need to know what causes it and how can i fix it. Thank you!