I have a Bush 2877NTX (11ak37) tv with no remote. When I connect a sky+ box it switches to Av , but if I try to use my svideo to scart lead from my tower pc it wont change to Av. The lead is a good quality lead, 4 pin. Works fine though if I use the portable tv in the next room. Any ideas folks? This is also the same if I try a Play station or X box, but its the svideo thats peeves me the most. thanks in anticipation......