hd channels - skybox

[rimo]

hi i have 2 hd sky boxes in the house that recieve the channels normal, however my f5 hd channels only 5% signal most mtv channels . any help

 

[sb18180]

could be channels have moved

 

[sb18180]

also f5s have some conflics with certain lnbs when there is other satboxes connected to the dish even though they all have their own feeds. this makes some channels to to 5% signal. people have replaced the lnb and its cured the problem i read.