Over the last couple of weeks ive been getting 'No Signal Being Recieved Error 25 on the discovery channels. Now again they deceide to come on. I also get the same on bbc news 24. All other channels are perfect & signal strength, as it always has been about halfway. Ive tried another box & its still the same. Sky want £65 for an 'engineer' but i dont think its worth it as i rarely watch it I might even cancel altogether. Any ideas what else it could be. Would the threat of cancelling bring an 'engineer' out for free.