I have asus x205ta under year old tonight was using says a triangle smbol bottom memory low save and press ok i did that 10 mins later came online agaib this time buzzing sound just wont stop i close lid down open still same. i now can put my password in but page does nothing just buzzing al time, i have had tp press the on button and take battery out power socket to stop, what can it be please also have many family videos i dont want loose thanks. running 8.1 windoes