Superdrive Problems In Tiger


Here is my system;
Machine Name: Power Mac G5
Machine Model: PowerMac7,3
CPU Type: PowerPC G5 (3.0)
Number Of CPUs: 2
CPU Speed: 2.5 GHz
L2 Cache (per CPU): 512 KB
Memory: 8 GB
Bus Speed: 1.25 GHz
Boot ROM Version: 5.1.8f7

I can read and burn DVDs but not Cd's. I am running Tiger. it will not even play a CD from the store, will not burn a CDr, nor read a CDR...It spiins for 20 seconds, makes some noise, and then ejects itself!

Can anyone help? I didn't see a firmware update.