salam...mera pc pehle thek chalta tha kuch ek month bad on kiya to wo power ob hokar off hojata he ab do teen bar power cable bhi nikal ke dobara lagai phr bhi esa hota he switch on karu to uski light on hoti he phr ek do mint me off hojata he or tone ki awaz bhi karta he jese kabhi keyboad ki plug ya mouse ki plug thek na lagy ho to karta he tu tu ki awaz.. plz bataen esa kyu horha he????