Optical Drive Does not read some discs?

by Donald Betts - 9/11/09 1:38 PM

My Macbook Pro 2.16 Intel Core 2 Duo's optical drive reads some discs and not others.

it is a..

Firmware Revision: KCVB
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media: Insert media and refresh to show available burn speeds

I can put the same disk into my old .. really old 550 MacBook and it will read the disc fine.
It seems mostly associated with discs that were burned on a PC? And mostly PDFs.

Hardware or software? How do I find out? Can I trash the "driver" for the disc drive and reinstall?