Cock, iv'e a feeling that DiSEqC is a bit flakey on the Combo, using either a EMP-Centauri or Spaun 8way DiSEqC switch i can watch a signal on the Promax screen and see the signal pulse On/Off - switching to another port i believe. Select a different LO setting and it behaves. When i spoke to Owen (tester) he thought it might be the supplied 1.5amp psu struggling that's causing the issue so iv'e been running my Combo on a bench psu for a while and monitoring the current consumption taken by the Combo/8way switch/Global active splitter/ lnb - NO motors used to drive the dish from the Combo, the maximum current consumption iv'e ever seen being drawn was just under 1amp, usually around 600mA average, so i don't think it's a psu problem but i do suspect something is upsetting the DiSEqC operation. Iv'e disconnected my 8way switch now for testing purposes but iv'e still got my suspicions it's a rx problem. Is it possible to quickly by-pass your switch, connect directly from the rx to the lnb on the dish and do a quick test ?.