Hi to all.

..ok, i'm new here, so noob-gloves on please lol. ..I have a freeview box, a loft aerial, and a signal booster. For about 50% of the time I can view all channels with no problems. However, the rest of the time the picture and sound are broken. That is to say, very much like when a dvd skips. Pixels on the screen, and the audio sounds like a broken mobile phone call. When this happens the BBC channels are barely watchable, with ITV channels disappearing alltogether. This can last for minutes, hours, sometimes days. ...what can I do to resolve this? Getting on the roof isn't an option, so is there a device that can further increase my signal? What could be causing it in the first place? ..any advice greatly appreciated.