Today both BBC 1 & 2 have gone very pixellated and occasionally no signal is displayed. All other channels are working OK. I have checked with my neighbours, who are still receiving these channels so the problem looks like its mine not the transmitter. I have completely disconnected the box from both aerial and power and then reconnected and performed an automatic search. This did not improve the situation. When I use the signal detection function it shows BBC 1 & 2 much lower than that for other channels. Does this mean the end for my 4 year old Hummy box? Any suggestions would be appreciated.