Acer laptop aspire5536
About speakers n dvd drive

My laptop is not working properly. one of the speaker is not at all working sometimes and the dvd driver fails to rite cd n dvd sometimes. and i vant my notebook to get formated because it works very slow plz do d need ful and help me out asap because i m in an urgent need of it . my acer laptop model no is aspire 5536 and machine serial no is LXPAW0Y00991605A23Z000 you can contact me on 9969229350 my name is NARESH GHAVRI

thank you