My digital TV picture goes “blocky” or freezes whenever someone is using a vacuum cleaner/hairdryer/power drill in the house. Why?
Digital transmissions respond differently to interference than older analogue transmissions. Although the interference source is the same, its effect is to corrupt the digital data used to construct the picture. Depending on the nature or severity of the interference, this can result in part or all of the picture data being unusable. It’s probably not the set that is at fault.
