I have never posted here before, but I signed up for the sole reason to (hopefully) offer a solution. I haven't gone through the 61 pages of replies, so I apologize if this solution has been offered, but I thought if I can prevent even one person from going through the stress that I went through, it's worth it to give 10 minutes of my time to share the solution that worked for me!
I had the very same problem. I'm a photographer and MUST burn discs for clients on a weekly basis, so it was a huge problem when my drive no longer recognized blank discs. I would insert the disc and after working and spinning for about a minute, the drive would eject the disc. Here is what I tried that DID NOT WORK:
-resetting PRAM
-running disk repairs from disk utilty
-different types of media
-I even tried inserting the disk with computer on it's side (since it worked for the users above)
Well, after a TON of research and a ridiculous amount of frustration, I found a solution that worked for me - directly from the Apple support site. The solution was to reset the SMC. On Powerbooks, I believe you should reset the PMU. Here are the two links that give instructions:
SMC link:
http://support.apple.com/kb/HT3964
PMU link:
http://support.apple.com/kb/HT1431
I have a Macbook Pro, so I followed the SMC instuctions. Scroll down to determine in what way you need to reset SMC (it's different for different computers). For example, if you have a portable computer with a removable battery, it one way and for portables that don't have a removable battery, it another. So scroll down the page to where it reads:
Resetting the System Management Controller (SMC)
Resetting the SMC on Mac portables with a battery you can remove
Resetting the SMC on portables with a battery you should not remove on your own
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Click on the option for your computer and it gives simple instructions on resetting. For the Macbook Pro, it was shutting the computer down, disconnecting the adapter, removing the battery, pressing the power button for 5 seconds, replacing the battery and adapter and then powering the computer.
Worked like a charm. I inserted the blank dvd and it opened in finder! I couldn't believe it.
Now, what really disturbs me is that we pay a huge premium for Apple products (often more than 3 times that of a comparable product). My Macbook Pro is only 2 years old and the hard drive completely crashed a couple of months ago. I had to have it replaced at a hefty price tag since my expensive Applecare warranty had run out. The girl at the apple store said it was nothing of my doing - probably just a faulty drive. Then this happens. Then I see that so many people have been through the same trials that I have been through and I find it outrageous. Apple should really step up and use better parts (or whatever it is that they need to do). They look great on the outside and they run wonderfully when the actually work, but when they fail, as they often do, it's not pretty. And it definitely takes it's toll on a small business like me. With all the talk of how Macs are "superior", they should certainly run like a superior product. Whatever happened to the adage "you get what you pay for"?! Just my two cents.
Anyway, hope this helps someone.