hi, i have a cheap v100 that was working ok until i moved house and set it up again(the same as it was before). now whenever i try to change channel on the dvd/vcr it's connected to, the projector screen goes blank with 1/3 of the screen with horizontal lines. It's ok if i stay on one channel and in dvd/vcr mode i can do everything, it just happens changing between channels or to aux. lines. some times i can change 2 or 3 times before it goes blank. when it goes i have to turn it off and on wich means a 5 min cooling off period. can anyone point me in the right direction? Could it be the electrical supply? i have tried every thing i know with no luck and can't find a forum relating to it.please help me if you can!