Optoma TX700 Projector Review - Warranty
Optoma provides an impressive 3 year parts and labor warranty on their TX700 projector. As far as duration goes, that's about as good as you can hope for, considering the average is about 2 years, and there are plenty of projectors with only one year warranties. (Several other big name brands offer 3 on some or most models, but one or two year warranties are more common.
Optoma's warranty is a standard "send it in for repair" warranty. They do not provide a loaner or replacement projector.