A couple of weeks ago, we bought a new telly, even though our old one was only two and a half years old. It wasn’t that it was out-dated or had stopped working, it was simply driving us crazy.

A few months after we brought it home, it began periodically turning off and needing to reboot itself (a process that could take as long as a minute and a half which, if you are in the middle of an episode of Shetland, is a long time). Additionally, it stopped recognizing our WiFi, which made it impossi...