Signboard Technician - Maintenance of Raised Letter Signs for Shops in the City If you are looking for a technician to maintain raised letter signs (shop signs) in Medina, here is a suitable phrase for searching or posting: Raised Letter Sign Technician – Medina Maintenance of raised letter signs for shops. Repair of LED lighting for letters. Replacement of transformers (Power Supply). Repair of damaged or fallen letters. Maintenance of acrylic and stainless steel signs. Installation and dismantling of commercial signs. Service for shops, showrooms, and commercial complexes.