LED module problem: LED display is composed of multiple LED modules. if one or more modules are damaged or faulty, it may lead to a part of the display or the entire screen is not bright. Check and replace the faulty LED module.Control card problem: The control card is the core component that controls the work of the LED display, and if the control card fails,the configuration error or the program problem, the display may not be bright. You can check the connection and configuration of the control card and try to reload the correct program.Software configuration problems:The control software of the LED display may have configuration errors or program faults.and it is necessary to check the software Settings and reconfigure or repair the program.High ambient temperature.dust accumulation, moisture intrusion.etc. These conditions may require diagnosis and repair by a professional technician.

Contact professional LED display maintenance personnel or manufacturers for overhaul and repair.