khi khoi dong ban co nghe thieng keu bip khong neu khong thi ban thu thao ram va chip ra ve sinh lai coi truong hop neu khong dc thi ban thao qua pin cua no ra de khong 5-10phut roi ban laptop vao ban thu lam nhe neu khong dc nua thi ban nen lay ra hieu sua chua thoi ( chu y la khi thao ra ban nho ngat nguon may tinh di nhe) chuc ban thanh cong.