LED light module with general resistance is mainly based on the LED lamp beads with the voltage and current to set. Now lamp beads used mainly piranhas lamp beads 5050 and 3528 SMD LED module and beads. They are basically the same voltage, white led, led display Shenzhen blue, green is 3.0V-3.4V led display repair, red and yellow are 1.8V-2.4V. With resistance at the time, bought the intermediate value selection voltage lamp beads, lamp beads buy if marked voltage 3.0-3.2V, select voltage of 3.1V. Followed by the current, generally piranhas SMD LED lamp beads and bead current common is 20MA, but also a little better chip lamp beads can be done 25 to 30MA, the brightness will be better, but the program will affect certain light failure led Light wholesale, 5050 SMD chip because it is three parallel package, which the current is 60MA. 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 screen repair | led | Gao Jin photoelectric provided by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) 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 Gao Jin photoelectric and you hand into the brilliant, for a better future!