my unit be manufacture April 2011 . I think that , be lead , I would have one less source of problem ... I be right , since the lead do not die . but the unit stop work in the middle of a movie . since its DLP , i think that the spot on the screen be due to the mirror stick at a specific position . I be not sure what go wrong , I never use the audio of the unit , but the day it die I decide to plug the output of the cable tv receiver -lrb- a\/v out -rrb- , and use a headphone . but the audio be intermittent , like something be digitally mute it on low audio level ... now , after power it up , only appear some ` random ' bright dot . no drive mount on the usb -lrb- maybe try a firmware update might bring it back to life -rrb- . by read other post , and watch how many question samsung actually answer on they site , i know my headache be just begin .