Alert You have attached an undersized ow power adapter to your system,which is less than the recommended 65W power adapter .To continue operating at peak performance.your system may also draw power from the battery.The battery charges only when the power provided by the adapter is greater than the needs of your system.Use a Dell 65W(or greater) power adapter to enable charging during peak system performance！笔记本开机出现这一段字要按F1才能进，要怎么办？