LED display Troubleshooting Process - Flowchart: 1. Determine your display is synchronous or asynchronous display screen; synchronous display shows the dependence of the display settings led display control software, asynchronous display does not depend on the display settings; 2, make sure your display is partial or full-screen display that the problem has a problem; LED display unit board failure: a single point or single highlight, or the entire line is highlighted, and not controlled 1, check the column whether a short circuit and power ground. 2, testing whether the line short-circuit the positive supply voltage. 3, to replace its driver IC. Changyang led display, 金锐光 electricity, led screen repair provided by the Science and Technology Co., Ltd. Yichang 金锐光. Changyang led display, Jinrui Guang electricity, led screen repair Yichang Jinrui Guang Technology Co., Ltd. (www.ycjrgd.com/) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: Generation total.