Share 42 inch Konka LCD TV LCD to change LED diagram - appliance repair - Huaqiang Electronic Network

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This is a 42-inch Konka LCD TV. When booting up, there is no sound and the screen backlight does not flash. The power supply operates at 5V, 12V, and 24V. The power-on signal is 4.5V, and the backlight turns on at 4.6V. The brightness control signal is set to 2.2V. The unit uses an EEFL lamp, which is known for being more expensive and challenging to repair. The failure rate of the high-voltage board is relatively high. A customer purchased a boost board and LED strips to replace the faulty components. Below are the detailed images showing the internal structure and repair process.