Hi Folks.....I am a bit new to this stuff. I have fitted Mag 250 box. Works perfectly when its working and watching. However when I press my TV source button to flick over from my Skybox to the Mag box, the picture comes on for a few seconds and then everything goes blank.Cant access menu , channel list on Mag box without having to unplug it and wait for it to load on. Is this common or is somersetting on my box that I need to change. Thanks folks