Had Humax Youview DTR T1000 for several years with no problems. Recently, when box has been on for a while, transmissions coming through Youview box are pixelating so badly we’re unable to watch tv. Programmes watched via i-players are fine. Have had new aerial & cable installed & retuned TV channels. Fantastic picture now just through TV, but as soon as introduce Youview box in loop, pixelation still bad & getting worse as time goes on. Is there any way to fix Youview box, or can anyone recommend a new one please?