iMac not reading CDs/DVDs
I'm on an older (late 2009) iMac, just installed Maverick a few days ago, but the problem preceeds this. Basically, my computer will not read CDs or DVDs. Any disc I put into the computer, I hear the whirring noise as if it's reading the disc, but it immediately winds down. It will repeat trying to read the disc 2 or 3 more times, then just spit the disc out.
I tried spraying some compressed air into the slot, and it still won't read most CDs or DVDs, but now when I insert an MP3 CD that my boss had burned for me, the window pops up for when you insert a blank CD, so the drive is reading blank (or previously burned CDs AS blank), but not DVDs or normal CDs (for example, it spit out both a video game installation disc and a movie DVD).
I made sure that if i go to Finder > Preferences > General that "CDs, DVDs and iPods" is checked, and everything looks normal in System Preferences > CDs & DVDs.
Anyone have any ideas?
iMac, OS X Mavericks (10.9), Late 2009 model iMac