Question about LG Televison & Video

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TV turns on to splash screen LG logo, but won't boot any further. Red LED light pulses at the bottom of the TV, but never fully 'boots up' to the Blue LED light.

We have a 3.5 yr old LG 42" LD550 TV. About 2 weeks ago, we turned it on and it wouldn't fully boot up past the LG logo screen. It just hangs on that logo screen until we hit the power button to turn it off. Nothing else works...no menu buttons, no input buttons, no volume. I opened it up to search for blown/bulged capacitors on the power board (PSU), but didn't see anything. Found a new PSU/inverter (they are on the same board for this TV) on www.shopjimmy.com for ~$50, so bought it and took a chance. Swapped out the PSU/inverter with the new one and I still have the same problem...so it's not the PSU/inverter. With my limited knowledge of LCD TVs, I'm now thinking that there must be something wrong with the main board (input/output board). However before looking to purchase a new one, I wanted to check here to see if more experienced people can chime in. Of course the TV is just 6 months out of warranty, but since the screen still works, I hate the idea of just throwing the whole thing out, if there is a relatively simple fix. I can post pictures of the PSU and mainboard if people think that would help, but since I don't see anything out of the ordinary on either of them, not sure if that is needed. This TV is never moved, jostled, or anything like that. It's been sitting on the same place for the past 3 years, so I doubt that any of the cords have been jiggled loose. Does anyone have suggestions of what I should look for on the main board that could be causing the problem? OR from what I have written does anybody have an idea that the problem may be located someplace else within the TV?

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Sounds like corrupted firmware. A firmware update is necessary. Get the latest firmware, and update it. Contact the authorized service center to get the latest one. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Dec 03, 2014

Testimonial: "The most recent update was 2012 and that has been installed. As I understand it, to manually update/flash this TV, you need to plug in a USB drive into the TV, the TV recognizes it, then you follow prompts on the screen to complete the install. Since I can't get past the logo/splash screen, I don't know how I could get the USB approach to work."

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Posted on Jan 02, 2017

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