Chosen Solution
My LG 55LS4500 stopped working and I am looking for some help. The issue first started with the audio going out every once in a while and turning the TV off and on would fix the issue. Now the TV does not turn on. There is no stand by light on the bottom right of the TV. I tried the flash light trick in a dark room and did not see an image on the screen. I took out the backplate and broke out my multimeter. The power unit is supplying the standby 3.5V. Do you think the main board went bad? Any help or advise would be appreciated. Update (02/20/2019)
Update (02/20/2019)
checking the micom voltage. Update (02/20/2019)
Assuming that the clock is fine, this is where the first issue comes up. I get no voltage out of the pin 1. I am assuming there is no way to re-download the software without the TV being on so I guess replacing the main board is the next step, right? Or does anyone think that the power board is the issue?
Hi @godfather17 Here’s an image taken from the service manual for the TV showing the Power Up boot check flowchart.
(click on image to enlarge for better viewing) Here’s a link to the service manual for the TV. To download the file, when the sentence below the Document preview box changes from This file is downloadable free of charge: …processing… to This file is downloadable free of charge: Download, click on Download as this is the link. Be patient, it may take a little while to find the file. If it is necessary, here’s a link to the firmware (and software upgrade guide)for the TV. Verify that your TV’s exact model number is listed in the Software File reference link, as installing the wrong firmware can brick the TV Hopefully this is of some help.
