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A few days ago, the guest sent a 50-inch "SElKl" model: SE50FY28 LED LCD TV, the power-on indicator light, no backlight, no picture, no sound. Initially judge the power supply constant current plate (constant current integration) fault. After the cover inspection, it is found that the power supply constant current plate is actually no problem. After detecting the power supply constant current plate by the multimeter, the low-end working voltage is normal at the moment when the "PowER" is pressed. Only the constant current output terminal sees the multimeter "cursor". It is null to about 94V one second. Obviously, at this time, the power supply constant current plate has been protected from the action state, and the author determines that the backlight (back-in type) lamp bead is faulty. Therefore, the treatment of lamp bead replacement is performed by individuals. The difficulty is very large and the risk is very high. It can be said that the heartstring is tight and the battle for success or failure is actual. Now I will share the operation process with the masters with the record of the picture: Because the disassembly of the accessories is found, the screen of the machine is glued to the outer plastic frame, as shown in Figure 11. If you separate the screen from the border, it may cause unexpectedness; if you do not separate it, it will cause inaccurate alignment when the screen is reset and installed, because the state of the screen alignment cannot be observed at the time of screen embedding, such as alignment. Accurate frame fixing screws will definitely cause the screen to be crushed. In view of this difficult and high-risk operation, the author carefully considers and develops the operation plan. Finally, the author uses practical experience and skillful single operation skills. Finally, the operation of the entire large-screen TV was completed, and it was safe and sound, in order to achieve the perfect success of replacing the light bar on the big screen! See the picture, thank you!
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.