Sometimes the laptop users face the problem of the lack of images on a laptop. Looking closer at different angles to the matrix can be seen that the image is still there, but it is without light. If a laptop is quite old, it can be assumed that broke down the back light in the matrix, in modern laptops it can manageable easily.
However, there are exceptions, such as dropping the notebook can split the bulb inside the matrix, while not breaking the very matrix. Such cases are encountered in our practice, they are solved by replacing the lamp in the matrix of the laptop. The inverter is a small charge placed inside the matrix. This board acts as a voltage transformation, i.e. of the input voltage of 15-19 volts at the output of the inverter formed by the required voltage to ignite the lamp in the matrix of the laptop is about 5,000 to 10,000 volts. Do not be surprised if this voltage current is sufficiently weak to cause significant harm to health, but the experiments do not recommend.
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