|It's possible the laser lens is dirty or dead. Go to a store that sells computer stuff (even stores like Walmart) and look for a disc drive cleaner. I have a few Memorex CDs that have a brush on the disc. As the disc plays, the lens gets cleaned and only takes a couple minutes.|
Fortunately, internal CD/DVD burners only cost about $20 on Newegg and they're usually easy to replace. Some computer cases make it difficult, but you'll also need to make sure you buy one that matches your cables: SATA (4 cables) or IDE (a ribbon).
Apologies if I don't respond to your reply immediately. I don't check this site daily, but you're welcome to PM me as a reminder.