B. entire unit board is not bright (black) 1, a few consecutive plate transverse direction is not bright led module light shell, check cable normal and abnormal cell plate connection between the cell plate is turned on; or chip 245 is normal 2, continuous vertical direction a few board does not light, check the power supply is normal in this column. LED unit board does not shine one, check 595 is normal. 2, check the upper and lower leg through the corresponding module is switched on. 3, check whether the output pin to 595 feet through the module. A lack of color LED unit board, 245 RG check whether there is output data. Whether two, check the output of the normal 595 feet and abnormal input 595 feet through wholesale led module, led module, high Jinliang photoelectric provided by Jinan High Jinliang Optoelectronics Technology Co., Ltd .. Jinan High Jinliang Optoelectronics Technology Co., Ltd. (www.zhkyled.com) strong, credible, in Jinan, Shandong liquid crystal device industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the high Jinliang photoelectric and you hand into the brilliant, for a better future!