Having issues w/DCT6412 intermittingly losing video/audio. Been through 4-5 boxes. Doesn't matter what display channel. MER/BER on afffected EIA channels stays consistent at 37.8-38.1 and e-9 (respectively). Freq Response and Group Delay are flat. Constellations show no impairments either. Equalizer Stress is great. Doesn't matter which output you use on the DCT--seen it in HDMI, Component, Composite, Coax......Any ideas?