Customer question: What information should I request before paying for a used LED screen?
English explanation
Start with a complete equipment identity, not only a selling photo. Request the display model, pixel pitch, cabinet dimensions, indoor or outdoor classification, cabinet quantity, receiving-card model, power-supply model, controller, current software and available configuration files. Ask for front, rear, connector, label and powered-on test photos. A screen that can display an image in a warehouse may still have mixed batches, missing accessories, unstable power supplies or an unknown receiving-card configuration. Separate confirmed information from assumptions. The serial number, nameplate and original specification are evidence. A seller’s statement such as “same as P3.91” is only a lead until the physical pitch and model are checked. Also ask about previous use, rental frequency, repairs, water exposure, storage and the reason for sale. These details do not automatically reject the screen, but they help estimate risk. Before payment, agree on an acceptance checklist: image tests, cabinet quantity, accessories, packaging, configuration files, shipping condition and responsibility for missing items. If the screen is for a commercial installation, include a technical inspection or a sample-cabinet test before the full purchase. Do not assume that an old warranty, firmware package or spare part remains valid for a new project.
Service boundary
Commercial terms, warranty and final acceptance must follow the signed quotation or contract. Technical suitability requires the exact product and site conditions. —
