In the LED screens, there are a lot of parts with potential violations of electromagnetic interference: numerous power supplies and LED drivers IC, used in thousands, and kilometers of unshielded wires. As a result, the LED screen can cause interference to television or mobile telephony in the immediate vicinity of the screen. Even worse, if the interference from the LED screen overlap with the official frequencies of the police or other public services.

Unfortunately, in Russia there is no central control over interference in public areas. It is clear that the owners of the screens receive from the manufacturers certificates of electromagnetic compatibility. But what kind of documents the manufacturer will not "draw", in the hope of a selling an expensive product.

Some time ago in Moscow, the authorities changed the rules for installing outdoor advertising. According to the new rules of the Department of Advertising and Media in Moscow, LED rack media facades with a degree of transparency of not less than 2/3 of the covered area are allowed. But it turned out that the media facades from Chinese manufacturers frequently have electromagnetic interference even higher than on stand-alone panel screens.

Although it would be logical for the Ministry of Communications to control industrial interference, for some reason, the control of media facades with a high level of radiation fell into the field of activity of the government communications service FSO (Federal Security Service of the Russian Federation). The bottom line is that often media facades are located on the main highways, which are simultaneously the routes of the first persons of the state, and such media facades clog up the government communication. Accordingly, the owners of such media facades come with instructions to turn off the equipment or even dismantle it.