LED Digital Display: 7-segment display for digital monochrome screen prices, suitable for production of the clock screen, screen, and other interest rates, display digital electronic display. LED dot matrix graphic display: dot matrix display device is composed of many evenly composed of light-emitting diode display module led monochrome screen prices, suitable for broadcast text, image information. LED video display: display device is composed of many light-emitting diodes that can display video, animation and other video files. Conventional LED Display: The display is made from steel installed in a fixed position. The main common outdoor LED advertising screen large single column, and the station was installed on the wall used to play single trips information, two-color LED display. Rental LED display: in the design, research and development to take into account the screen is often used for installation and removal, so the left and right lock box with quick connection with positioning, precise positioning, the entire cabinet installation is completed within 10 seconds . Leasing screen is mainly used for stage performances, wedding venues and large Gala. Led unit board problems are divided into four points: 1, the entire board is not shining: mainly because of the power unit board or board within a missed line connection error, resulting in a difference of positive and negative circuits. 2, the board is not shining, transportation function properly: this is due to damage caused by the built-in circuit board can be 74HC138 4 feet and 5 feet caused by short circuit. 3, every three non-shiny: In 4953 the board is damaged. 4, interlaced shiny: to be able to analyze a circuit problem. ①: Check the cell plate Built 74HC245 and 74HC138 whether Weld. ②: use a multimeter to measure whether the 74HC138 1 pin voltage is about 2.5V, there will replace 74HC138③: measuring electricity transmission status lilies with ICA signals. led monochrome screen how much money one square meter | Jinan monochrome screen | Thai macro photoelectric provided by Linyi Wang Tai Electronics Co., Ltd. Linyi Wang Tai Electronics Co., Ltd. (www.ledzkd.com) (www.ledzkd.com) strong, credible, in Linyi display equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving macro innovative ideas will lead Thailand into the brilliant photoelectric and you work for a better future!