Mac 10.6.8 won't play DVD
I tried to play a movie on my computer last night, something I've done before, and it can't read the disc. Just spits it back out. Tried w/another disc, same result. Checked the hardware (as per instructions)...doesn't list any ATA or PCI cards. DVD player is selected in 'CDs & DVDs'.
Now what?
iMac, Mac OS X (10.6.8)