LED display in many different applications, from your first DVD player to display on your bedside clock. LED is a light-emitting diodes, uses very little electricity, and emit very little heat. However, even these simple little electrical components can go bad, or lead to damage and needs repair. The exact process will vary depending on the device's LED display on the cover, but the basic rules are the same.
　　1, plug in and press the power button, turn on the LED display on the device. Note: Some of the LED display does not, or if the entire unit can not be opened. Switch off your device from the power outlet. Placed in a clear, dry work space projects.
　　2, the equipment frame to expose the LED display. If possible, cut off from the crushing of individual LED display. Cable zone from 1 / 4 inch. Then install the new LED twisitng the wire, resulting in a free legacy of each line of the relocation. With electrical tape wrapped exposed wire. If the LED display is a single unit, unscrew the display from the installation and disconnect any cables. In the slide show and replace the power cord connected to it.
　　3, re-install the device on the housing and back to plug into a power outlet. Open the device and trigger the LED display to check if it works. If it does not work, the problem may appear to provide the information or the power unit and circuit.