You can always check if your machine is covered by going to the Support page and on the right hand side under "Services & Programs" click on the "Check My Warranty and Repair Options" and it will give you detailed information after entering your computer's Serial No.
Then, if your machine is not covered under warranty, you can choose options for repairs that Apple will perform--even if it's not covered by warranty and/or AppleCare--and where you can go to get it done, and how much it will cost.
On a different note, even if it says your machine is no longer covered, sometimes--in rare cases, and as such, my case--the information can be incorrect or corrected. I bought my 12-inch PowerBook from CompUSA as an open box unit and it was already 1.5 years old according to the automated system.
However, I called AppleCare, (e-mailed rather) and told them that this machine was never used before I purchased it other than being an open box or demo unit in the store, and that I was its first owner. My proof was my purchase receipt, and upon faxing it in, I gained a full year of coverage (limited warranty) from Apple starting from the day that was reflected on the purchase receipt.
I ended up being able to get a brand new LCD screen and a replacement AC adapter under AppleCare. A package worth $750+ had it not been under warranty!
(Which was kind of a bummer too since CompUSA required me to buy their TAP warranty due to policy on demo units... but I'm not complaining, even if CompUSA is gone, since I still have less than two years left--three year service plan--on their warranty which is being serviced by a third party after their stores closed. Screen replacement and battery and what not are covered still! Plus I could also have bought AppleCare extended warranty, but with the TAP already paid for, I figured, no need to spend more money on something that will be outdated in 2009... already outdated in 2006, really!).
Message was edited by: Pismo 900
I guess I should have provided that link, in case it moves somewhere else (though this link could expire as well!):
[https://selfsolve.apple.com/GetWarranty.do]