1st time poster hello everyone, Have the 61 DLP its about 4 yrs old had it seviced 2 days ago would shut off after about 2-3 hrs of use, so no real problems, But under waranty had service come out. The guy doesn,t know whats wrong so orders A light engine, power supply ballast, an lamp, said every thing is new except Digital board. NOW- tv looks -okay but on a BLACK screen blotches appear like a hand print i tried to wipe them off but there on the inside, ie lens lamp ??? Anyone have a clue to what this guy put is hands on thanks for reading the blubberish, Bob l