Electrical and electronic skills, quality as well as meeting the deadline made repairing this advertisement our flagship job in the advertising field. The old installation was in a really bad shape. Preparing an expertise and damage inventory took us one day. It turned out that it required a complete makeover, including replacing and installing cables properly, replacing controllers and impulse power devices as well as mechanical installation of subassemblies together with proper moisture and lighting protection. We modernised the switchgear centre and we exchanged halogen lights with LED lights. These are only the most important elements of this job. The display can be seen in Aleja Krakowska in Warsaw.