Customer question: Why is half of the used screen blank after the cabinets are connected?
English explanation
A blank branch is often a mapping or topology problem rather than a dead display. Start with a physical cabinet map showing columns, rows, cabinet numbers, signal IN/OUT, receiver addresses, processor ports and screen zones. Use the actual viewing direction and maintenance orientation. Do not rely on a software rectangle that does not match the physical layout. Confirm that the processor output connects to the first cabinet’s signal IN and that each following cable uses the approved OUT-to-IN direction. Compare every cable label with the drawing. In the configuration software, confirm cabinet resolution, cascade order, port assignment, screen direction and total/port pixel loading. Irregular or independent screens should be mapped as approved zones, not improvised as one large rectangle. Test one known-good cabinet first, then add cabinets one at a time. Use a grid and arrows so that mirrored or reversed paths are obvious. If the fault appears when one cabinet is added, inspect that cabinet’s upstream/downstream cable, receiver address and configuration. Save the old mapping before sending a new one. After commissioning, photograph the sending device, first cabinet, mid-chain and final cabinet. Keep the final port map with the service documents.
Service boundary
Exact port loading and layout limits must follow the current controller specification for the installed model. —
