Over the last couple of weeks, the sky box has had difficulty watching some channels like Dave (111) with the picture and sound being blocky. The signal wasn't perfect, but certainly both strength and quality were over 50%. I have tweaked the disk and Signal 1 is now nearer 80% Signal & 90% Quality. What is strange is that Signal 2 is non existent until I reboot the box. It then shows a similar signal strength to signal 1, so I'm sure that the dish is correctly aligned. If I go straight to Ch.111 the blockines is immediate. Sometimes the picture freezes (with a good quality still!) but the audio is perfect. This is only affecting Signal 2. I have moved the LNB inputs around and I get the same behaviour irrespective of which port is used. Sometimes the fault swapped between singal 1 and 2. Does this sound like a faulty LNB, or are there any known box specific issues? The box isn't great and the fan is starting to sound noisy so I wouldn't be suprised if it's on its way out. Any feedback gratefully received. Regards Peter.