So now the drive won't
read cds either. Um...sorry, but your drive may be dead. MAY. I am no expert. However, I had the same problem last month. First, I couldn't burn cds. Then, I couldn't read DVDs. Cds would
occasionally read, but the response was sporatic. I had to send it to the shop to get a replacement drive.
You might try cleaning the lens of the drive first. If that doesn't work, then...sorry

. Believe me, I've been there!