The Optoma HD23 projector comes with a one year warranty on parts and labor.
The lamp comes with a 90 day or 500 hours (whichever comes first) warranty, which is the most typical, but also the shortest lamp warranty manufacturers offer.
I'm not generally a fan of 3rd party extended warranties, yet, due to the high cost of out of warranty repair in many cases, I do recommend at least considering a low cost 3rd party extended warranty. Go for at least one extra year (two is your option), when confronted with projectors with one year warranties, such as this HD23 home entertainment projector.
Consider some of the competition that are plus or minus a couple hundred dollars, the warranties look like this: Acer H6500 1 year, BenQ W1070 1 year, Epson Home Cinema 8350 (2 years with replacement program both years) Mitsubishi HC4000 comes with 2 years, Panasonic's PT-AR100U (one year), Viewsonic's Pro8200, which is also under $1000, comes with a three year warranty.
So, while the HD23's one year warranty may be typical, for the price, some do have better warranties. Consider the HD23's warranty to be a basic one. As they say, in this case, the warranty is "nothing to write home about." One year? Yawn!