Solution: Check the display screen is abnormal body power source is working; the signal transmission line fault; Screen single module failure. A. output in question 1, the detection output interface to the signal output of the IC is connected or short circuit. 2, the detection output latch clock signal is normal. 3. The last driver to detect whether data cascaded output data interface port and output port connection between IC or short circuit. 4, chassis cooling is not good, resulting in temperature rise due to the graphics card. LED monochrome dot matrix display is the use of light-emitting diode module p16 module, or pixel units of flat display screens. Because of its high light, long life, flexible configuration, rich colors as well as indoor and outdoor environmental adaptability, etc. 3.7 module, since the late 1980's, with the improvement of LED manufacturing technology in foreign countries It has been widely used. After China's reform and opening modules, especially in the 1990s, the rapid growth of the national economy, for public release of the increasingly strong demand for information, LED display appears exactly adapted to the market situation, thus in LED display design and manufacturing technology and on application level have been improved rapidly. led module wholesale _ Gao Jin photovoltaic (certified) _ module provided by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) is an industry leader in Jinan, Shandong, liquid crystal devices, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Gao Jin photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high gold Photoelectric better future.