we buy this projector about a year ago and love it for the first 11 month . then one day , we try to turn it on and it would not work . curious . we pull out the manual , which display a series of troubleshoot step . when we turn on the power , the blue power lead light blink 8 time , indicate that there be a dmd error . turn out that stand for `` Digital Micromirror Device . '' we do not really know what that mean , so we call customer service . the customer service representative be very friendly , and he walk we through the troubleshoot step . he confirm that it be a dmd error , which be cover under warranty . we ask he if it could be a lamp issue -lrb- which be not cover under the year-long warranty -rrb- , to which he reply that it be `` unlikely . '' we pay the $ 20 to send we projector to the warranty department . after about a week , we get a response that it be a lamp issue , and it would cost $ 250 for they to fix it and send it back . if we do not want they to fix it , we would still have to pay $ 75 for a `` out of warranty diagnosis , '' plus shipping -lrb- ~ $ 25 -rrb- . so we would either pay $ 250 for a work projector that be still within the first year of purchase , or $ 100 just to get we broken projector back . I call customer service and explain the situation , tell they that we do everything we could to confirm that it be NOT a lamp issue prior to send in the projector . there be serious fan issue and the power button be not work properly , which I assume be symptom of the DMD error . the folk at customer service be not very sympathetic . they do not have any more information about the error , they would not let I talk to a technician , and they do not have any documentation about these type of error . I still have no idea what a dmd error mean . the user manual say that if it be a lamp issue , the orange lamp light should blink , which do not happen for we . we have the projector mount to a ceiling where it never move , receive plenty of air flow , and be only use for a total of less than 400 hour -- not the 3,000 hour that they claim the lamp should last . after read some of the review , we find out that we be not the only one who get screw by the Vivitek warranty department . the language in the warranty and the product manual itself be mislead . in the meantime , Vivitek be hold we projector hostage . I have hear that Amazon be great about return faulty product , but we be not so bright and we send the projector to Vivitek instead . EDIT : about four month later , after we have completely give up on the Vivitek projector and buy a new projector from another company , we mysteriously receive a package in the mail from Vivitek . Lo and behold , it be we old projector -- and it be fix ! there be absolutely no explanation about what have be wrong with the projector , and why they have suddenly decide to send we back we projector that they previously claim be not cover under warranty . Wish they could admit to they mistake and\/or tell we what be go on . vivitek suck at customer service and communication .