I have just set up my VCR, DVD and Sky Digibox to play through my AV Amp onto an LCD projector. I am getting diagonal lines across the screen any ideas? I've made sure all devices are some distance apart, I have tried to use good cabling throughout. This digibox is a second feed fom the dish via anew Quad LNB, the original box gives no such pattern on the telly downstairs? Help, please!