Note: Connection of LED must noted that the interface definition is just positive pole and negative pole, the positive pole input power supply must not be connected backwards or wrong, improper connection caused by the consequences. Specification: Condition: 100% Brand New_x000D_Item Type: LED Boost Board_x000D_Model: 12ES_x000D_Material: Printed Circuit Board_x000D_Color: As Pictures Shown_x000D_Input Voltage: 10-20V_x000D_Output Voltage: 15V-88V_x000D_Suitable for 15-24 Inch Universal LCD LED_x000D_Quantity: 4PCS_x000D_Weight: Approx. 94g_x000D__x000D__x000D_LED inverter board modified problem:_x000D_1. Connect power supply, ground wire and switch signals required by boost board to universal LED boost board_x000D_VCC power supply ON switch signal ADJ brightness control GND ground wire_x000D_Prompt: Connection method same as LCD inverter board_x000D_2. Use multimeter to measure out how many lines the LED light connecting line power supply is, What are the negative poles and what are the lines_x000D_Line more is just positive and negative points, should do not use technology, see the light bar can see the definition._x000D_Prompt: The power supply of LED lights is the same. They are all connected together. The number of negative electrodes represents the number of series electricity_x000D_CN1: power supply, power supply, switch signal, brightness control, ground wire, ground wire Features: 1Input voltage of 10?20V, output voltage of 15V?88V. 2LED boost board, recommend professional modification and maintenance. 3Used for light chain pressure raising, power supply, suitable for 15?24 inch LCD. 4Made of high quality printed circuit board material, sturdy, durable and long service life. 5Professional manufacturing, stable characteristics and high reliability. PackageList: 4 x_x000D__x000D_LED Boost Board