i just received an H20 Mfr. 100 receiver from an Ebay purchase (Directv had none left, 2 calls). Replaced an H21-200 that got great reception for all my channels. Unhooked satellite wire W/ B-band converter from H21, hooked to H20. Same with HDMI cable. Went through satellite setup on H20, no signal from any satellite. Cables back to H21, great reception. Not sure, in H20 setup, if I have 6x8 or 4x4 multiswitch on the slimline dish, but with either setting, no signal at all...