Having sorted a firmware problem with the kind help of forum members, it seems that there is a problem with my RF input. The i/o 'module' seems to be solidly soldered to the main board, but there is a slight movement at the input socket. I've tried it with different leads in different locations and it does seem that the problem is with the box. With HD Fox T2s going for around £20 on ebay, i imagine that it's not viable to have this box repaired, unless anyone has any ideas?