Sp2 should not damage any hardware, but there may still be some software problem with your PC. A good way to test this, is to try the DVDROM outside of Windows.
You can do so in several ways. If you know how to handle dos, you can pay a visit to www.bootdisk.com and get a cdrom-enabled bootdisk from there. Boot your system with it and try to access a disc in your Sony drive.
If you can’t handle dos, you could try a Linux LiveCD. Pay a visit to www.knoppix.net and get the Knoppix LiveCD from there. Burn it, boot your computer from it and try to open up a disc in your DVD-ROM drive. As Knoppix offers a nice GUI (KDE as a matter of fact), you’ll easily find your way on doing this. No, Linux isn’t scary