TCL LCD TV L32E5200BE secondary non-boot failure repair example - appliance repair - Database & Sql Blog Articles

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TCL LCD TV L32E5200BE power indicator light is on, the standby button cannot be turned on, and the power supply board 3.3V is normal 24V. The power board is forced to start the 24V output separately. After observing, 24V respectively supplies power to the backlight board and the motherboard, and a dummy load is not connected to the backlight board at 24V. Connect the motherboard to the power line and press the power button to light the light. Press the power button again to turn off the light bulb. This shows that the power board motherboard is good, the problem is in the backlight board. Measure the P3506DD on the backlight and an 18N20 field tube breakdown. If there is no accessory at hand, the LCD TV will be repaired after the entire board is replaced.