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LG 42lm670S TV Not Responding After Power Outage - Fuse, LED, Remote Control

fizjolog 9447 10
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16516922
    fizjolog
    Level 8  
    LG 42lm670S TV 4.5 years old. The TV was on and nothing else was connected to the sockets. Suddenly he turned off, it turned out that the fuse in the apartment was thrown out. After switching on, everything works, the power is in the sockets, only the TV is silent (even the power LED is off, it does not respond to the remote control and the power button). I unscrewed it, but visually nothing can be seen burned, the capacitors are not swollen, etc. What do you suggest, of course, you can always return to the service, but maybe it is a bit of a shit. There is no typical power supply here, at least a separate one.
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  • #2 16516930
    krakarak
    Level 42  
    "Visually" it reads the motherboard model, matrix and gives in the subject.
    And meter measurements.
    The meter is in your hand and work ... If you make any measurements of the power supply (even this one not typical) then write.
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  • #3 16516975
    fizjolog
    Level 8  
    Maybe a hint, what do you think I should be interested in?


    LG 42lm670S TV Not Responding After Power Outage - Fuse, LED, Remote Control
  • #4 16516983
    krakarak
    Level 42  
    If you want to repair electronic equipment, then with electronics and safety when measuring voltages that are life threatening ...
    What is your voltage at 82 uF / 450V capacitor?
    The fuse on the left he is not blown?
  • #5 16517029
    fizjolog
    Level 8  
    So yes, the voltage where the power cables are connected to the bone is (at the output of this bone into the board). The fuse soldered into the plate on the left (with a red stripe) near the bone with the power cable is blown (the meter does not buzz when the meter tips are applied to both ends of the fuse).
  • #6 16517035
    krakarak
    Level 42  
    The wires are not connected to the bone, but the plug and the plug in the socket ...
    Measure the rectifier bridge for a short circuit without a power cord inserted into the 230V network.
    I wrote about the F101 fuse to the left of the soldered terminals of the 82uF / 450V capacitor, also glass, but slightly smaller.

    The EAX64744201 module is available in the network for purchase from PLN 120, e.g. here: link
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  • #7 16517056
    fizjolog
    Level 8  
    So the f101 fuse is working. Which rectifier bridge is it?
  • #8 16517060
    krakarak
    Level 42  
    Thank you for nice cooperation.
    To repair electronics, you must have at least minimal knowledge in this area.
    You should also be able to use your own mind and use the Internet, especially the search engine.
    Just enter the "rectifier bridge" in it and see what enclosures it is in and then look at your power supply.
    Forum is not a chat.
    Carry equipment for service.
    Maybe it's just a blown fuse or maybe something else ...

    Have a nice day.
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  • #9 16517132
    fizjolog
    Level 8  
    The bridge with the RS15005M designation (on the board in the lower right corner) has a short circuit (I put the meter tips to the leg + and the legs - and the buzzer buzzes.
  • #10 16517138
    krakarak
    Level 42  
    This means a short circuit. Transistors, capacitors, diodes and the bridge itself can be shorted. Replace the fuse itself it will be a buum.

    This is my last post in this topic.
    Maybe another colleague has time to show what to apply and how to interpret it ...
  • #11 16517145
    fizjolog
    Level 8  
    I understand, thank you for the time spent on the subject.

    Added after 2 [hours] 38 [minutes]:

    Will there be a person who can help me in the subject?

Topic summary

The discussion revolves around an LG 42LM670S TV that became unresponsive after a power outage, with the power LED off and no response to the remote or power button. The user inspected the TV and found no visible damage, but later discovered that the fuse on the board was blown. Participants suggested measuring the voltage across various components, including the rectifier bridge, and identified that the RS15005M rectifier bridge was shorted. Recommendations included replacing the blown fuse and potentially the rectifier bridge, emphasizing the need for basic electronics knowledge for troubleshooting.
Summary generated by the language model.
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