I have a Dell Vostro 1200 Laptop and used the dvd writer with no problem. It is now not working with no known reason. Just able to reject the drive in software but not recognizing cd or dvds placed in. The busy light is always on and the spinning never works. This is the same for Windows and Linux OS and couldn't be a software problem. I doubt if the header is damaged because the problem is only with cd/dvd recognition. Any Guidelines? Is it necessary to replace the device?