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LG 50pa4500-UA front light flashes twice

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    LG 50pa4500-UA front light flashes twice

    Had wrong model number corrected in this post, unable to edit the other

    showing power does nothing randomly turns on with 2 flashes: https://youtu.be/ZHME8GthErc


    Hello all I have an issue with my tv. I have had it for about 5-6 months because when I moved apartments the previous owner left the tv. and I got it for free it is a plasma tv and looks nice enough. an issue that started to happen was that it would kick off randomly but I could still turn it on well about a month or so I assumed the power button went out so I got a universal remote and programmed all lg codes and nothing just the solid red standby light so fast forward to a week ago and i got curious so I opened the TV up after find this video https://www.youtube.com/watch?v=C7UChm5b_rw same issue press power button still in stand by. sadly I dont speak this person's language andddd the auto generate CC is a bit hit or miss so I knew where to solid the transistor.

    I got a similar spec'd transitor as finding those transistors are difficult as they are disconnected, so I looked at a datasheet, found some info but went to an electronic discord to make sure everything was correct and what I should look out for, they told me as long as it drives with 4 volts on it would be good. I found a transistor that was 4 volts power on. and confirmed with the discord people that the transistor would be suitable for my needs. so I got it today and went to work well my soldering skill sort of suck right now so I couldn't get it on well, but enough to test so I pressed the power again no luck well I decided to just remove the leads and see if it powers on by some luck and to my surprise it did, but something was off... there was a logic control board that

    flashed 2 times in sync with the stand by indicator but it turned on none the less.

    i was happy it turned on then it randomly turned off as I was texting a friend that it works but I am not sure why. then you see in my video pressing the power does nothing after five minutes it randomly turns on I dont think using the av cables help it was just sort of dumb luck now it turns on for maybe 10 mintues turns off for about 5 then back repeat repeat repeat.

    #2
    Re: LG 50pa4500-UA front light flashes twice

    You will get a lot more help on this forum if you post clear pictures of your TV boards and an overall shot of how everything is connected on the back.

    Lets see if we can help you resolve your TV issue.
    -Thomas
    I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.

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