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LCD TVs - LED
LG 42 "LED TV Model 42ln5700 Do not Light Leds
hace 5 años
hace 5 años
Good morning friends of me I repair ... I got this tv which works optimally ... you hear and the display turns on but the panel LEDs do not light ... between negative and positive pin of the LED connector on the source I It gives 8.0vy and falls to 0.5 and returns to 8.0v, with the negative tip between chassis and positive of the LEDs at the source it gives me 234v and falls to 216v and returns to 234v ... the voltage is unstable ... that can be the cause?
42
hace 5 años
hace 5 años
You have a problem with the strips, you have to disassemble the panel to check the LEDs, usually on the card it comes that voltage gives you the source for the LEDs, count how many LEDs it brings and divide the voltage into the amount of LEDs that the TV brings and with that you will know at what voltage they work (can be at 3V or 6V).
Luck.
hace 5 años
Ready friends ... I will proceed to measure the LEDs and as soon as I have an answer I return ... although it is rare that I do not get the voltage before the transistor mosfet ... since before this transistor must be the voltage without connecting the LEDs
hace 5 años
Friends I just checked the strips and I found 5 damaged LEDs ... tested with a multimeter just do not light and others mark short ... there is a busted LED ... is this because of the source? What do I do?
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