ContributionsMost RecentMost LikesSolutionsRe: Cox Mini Box Cisco DTA250 pixelation and tiling and running hot Cox send out refurbs that don't work Could be foreign voltage on your coax cable line. May be best to have a tech come look at your house wiring. As for the AC adaptor, have you thought about putting it on a surge protector or check the outlet you have it hooked to? Mini boxes dont usually get that hot.