After I sent back my NEC1000 because the picture was jumping they gave me a another NEC 1000. The new projector has the same problem - in fact the projector picture jumps is even worse. The problem begins about an hour of watching. The picture starts to flicker then it gets worse. It is totally unwatchable. If I switch off the projector I can get another half hour of viewing unitl the problem starts again. With two projectors in a row suffering from this problem - I think you ought to give this projector a miss. It is clearly very unreliable!!