My superdrive will no longer read dvds, but it will read blank ones, whats wrong?

Question

I hope you can help; progressivelymy superdrive has stopped reading DVDS, it reads blank ones straight away withno issues but dvds, games, movies etc it doesn’t read anymore.
It now wont read abrand new game I bought (the sims late night) and will not read the apple snow leopard disk and wont read any dvds.
It sounds like its working, no loud sounds - it sounds fine then it spits it out.
My tech info is ;
HL-DT-ST DVDRW GA11N:
  FirmwareRevision:          KA18
  Interconnect:          ATAPI
  Burn Support:          Yes(Apple Shipping Drive)
  Cache:          2048KB
  Reads DVD:          Yes
  CD-Write:          -R,-RW
  DVD-Write:          -R,-R DL, -RW, +R, +R DL, +RW
Write Strategies:            CD-TAO,CD-SAO, CD-Raw, DVD-DAO
Weirdly I updated it 10.6.8 from 5 and itworked after 5 tries with my disk but then, when I turned I turned the computeron the next day It wont work, and the superdrive doesn’t work now.
I live very far from the nearest applestore – 50 miles so it’s a hassle to haul my 27inch imac there.
Please help!

Answer 1

No these forums are not moderated by employees. that's why they call them Communities, it's all Mac users.
It's also very hard to give you a straight answer just like that. This may sound stupid, but are you sure you're inserting the disk right-side-up?
You can try running the hardware test (if you can reboot from the DVD: reboot holding the C key) but if you have these issues with a Mac under Warranty, it may be best to bring it in. Check with Apple, as ther may be a certified Apple repair shop closer to you.