Repair LCD TV, if the image appears black, black channel interference, beating, first check whether the output capacitance of each channel is close to failure and leakage. If there is a hum, you should also consider whether the capacitance on the backlight board is close to failure or leakage. Also consider whether the remote control and each button are sensitive. If the effect is not good, it is a capacitor failure in the 5V circuit. The reason is that the filtering effect is not good. The composition is increased and the voltage is appropriately lowered. If these components are checked properly, it is caused by other component failures, so the repair speed is faster. Answers about other failures.
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