I've been stressing about this. TV powers on. I have sound through the surround sound but not TV. You turn it on ang LG logo appears and then it’s just black with the backlight on. Jonathon Prete. Turning the TV … Flat Screen HDTV Has Sound But No Picture – Screen Is Not Cracked Read More » Look for a red light, most TV's will have a red light turn on when the TV is off to indicate it is still receiving power. Reconnect the power cord to the wall outlet and turn on the TV and check what happens. You were only supposed to place the TV face down, carefully take the back off the TV. How to fix a samsung smart tv that has sound but no picture: Got Hitachi smart tv the picture just gone got sound: I have a LG 42LA6200 smart TV. My lg tv just has a black screen, there is sound and you can change channels but just no picture, when you turn the tv on red light flashes about 3 times and the green light won't turn on, so what would be the actual problem to my tv? So every few days, the problem appears. What we also tried was, Go into settings and turn “off” the back light. Open the Settings menu either by using the button on your remote, or if your remote doesn't have a Settings button, press the Home/Smart button, then click the Settings icon. Accessibility. I bought the tv last year Model Number # 49UK6200PUA; Serial Number # 811MXGLPW367 Basically, if I turn it on the LG logo will appear for about a second or so and then the screen goes black. Try a power refresh just in case it is corrupted firmware, it doesn't take long to do. LG 42LN5700 TV. First at 10%, then after a few hrs to 15%. what was it can you elaborate??? but thank you soooooo much!!! Anyone know if this is the power supply or main board. The LG logo showing means that mostly the hardware is OK, i.e. I noticed a few more things: - There is a green LED LD701 on the power board that starts blinking when the screen goes black (blinks 5 times), - The red standby light blinks 3 times when I I turn the TV on and before backlight turns on. 1. Input: Application, TV Tuner, or game on the TV Output: TV Speakers. It is also weird that if I don't touch the TV for a week - it will turn on again and work fine for another 10min or so. Turn off the TV, remove the TV power cord from the wall outlet (or powerstrip) and then press and hold the TV power button for 30 seconds and then release the power button. the power and the screen and the connection between the mainboard and the screen. The issue was power, we unplugged alot electronics changed the multiplug and immediately saw a difference, check power supply to the socket as well, My lg tv just has a black screen, there is sound and you can change channels but just no picture, when you turn the tv on red light flashes about 3 times and the green light won't turn on, so what would be the actual problem to my tv? When I check the pins on the power supply I have 9 10 11 and 12 all showing 3.5v but all the rest show 0. When it cold it will shows the lg symbol but when it gets warm it shows that it's on the component input and when I hook up the hdmi it dosent change to hdmi it stays on component input and it multiplied half way down the screen I'm thinking video card, 04/12/2020 by No, haven't fixed it as I couldn't source replacement parts for adequate price. Try to change the power supply before dealing with the lights. this sounds more like a main board issue than a power board issue. I got it since 2017. Solved! It worked. Nothing worked. Took the back cover off and uploaded the images of all 3 boards. That'll be the green board in your pictures. Please advise Thanks @crashxxx all of this "no sound. I managed to squeeze my 16 inch telly into the oven and set the heat to 180 degrees, but this resulted in the plastic melting around the edges. The logo comes from the mainboard eeprom chip whereas all the other signal information uses the digital signalling video/audio processing chip(s) on the mainboard,so it appears to be a mainboard problem. If the picture doesn’t come on it just turns blue or black , when I turn it off and back on and the picture comes in it will be white and say rca. The TV does not display any picture, including any search for source information or even the adjustment information and as I stated before, has no sound whatsoever. It looks like you're new here. You are the bomb! My TV does light up in the back their is just no picture. Did you not read the part that says the backlight is still on your thinking of the issue where it's just the backlight that dies and make the screen dark our issue even if you put a flashlight to the screen you cant see the picture you can visibly see the backlight lighting up a black screen, 10/14/2020 by As soon as the screen goes black - there is no sound. When I took the TV off the wall and tried turning it on again a few days later - it worked fine for maybe 10 seconds and then the screen went black again. Help. 06/17/2018 by The set rebooted and ... Voila! Remove board and place in Warm oven for 20 minutes. Its been like tbis for more than 2 years now. So perhaps in my case was dust over power supply area?? 1. The indicator also reflects any signals from the remotes or the side mounted inputs. That should do the trick, and it will never switch off, if … Mine just died last eve, and each time I tried to restart it, I saw the LG logo, and my HDMI input info, and then it faded to black w/in 2-3 seconds. The model is LG 70" UH635T, I could find it in the list so had to choose a random LG model when posting this question. Windy Freckle. Sounds like a better option than buying a new tv... not sure if I should really start with the power board though. My LG 55 TV turn on, show the LG symbol for 2-3 seconds then goes to black screen/shut downs. It comes on for awhile until possibly the failed component heats up enough to quit working. Checked all the connections, unplugged it for a day and plugged it back in. @crashxxx backlight on without video is usually a main board problem you did not tell us if you get any sound. Mine went out too. The LED light comes on briefly. ... Can my 55inch LG TV that have sound but. United Led 29" sometimes no picture only sound. Post pictures of your boards so we can see what you see. I checked the voltage on the Power supply, everything was normal. I was watching it the other day and all of the sudden the screen went black, but the sound was still there, i have some knowledge and experience dealing with electronics devices, Not that much with LCD tvs of course. The TV is just sitting in my garage at the moment. After switching it on the picture flashes for a second and then the screen goes completely black. If the picture doesn’t come on it just turns blue or black , when I turn it off and back on and the picture comes in … I have an LG TV model 42LV550T, the power light comes on but no sound or picture. oldturkey03. I hope there's something I could try before I throw it away. Help. Refer to the specific audio input and output scenarios to identify why no audio is heard on either the TV speakers or the external device speakers. Yes I bought the tv last year Model Number # … tv still doesn't work. Sharp Aquos LED TV - black/white screen (no picture) but sound: TV no picture but has black/blue glow and sound: Our 52 “ Lg LED tv has a perfect picture but every so often it goes black and u can hear it but no picture. How old is the TV? I bought the tv last year Model Number # 49UK6200PUA; Serial Number # 811MXGLPW367, If it is less than 12 months old and you bought it from new, check the warranty statement that came with the TV or perhaps it is in the user guide that came with the TV as to what to do to make a claim for a manufacturer's warranty repair or replacement, Hi I have a 50 kg smart tv it only has a power button no channel button or volume and no remote and the tv turns on shows the lg symbol and then goes to an off black/blue screen I've tried to hook up my blueray to it it goes on to the hdmi but doesn't show anything any suggestions, 04/01/2020 by Turned it on Friday morning and now all I have is sound and no picture. 04/28/2020 by Saved me a ton of $$$ and stress. the power light flashes like twice again its doesnt turn off only the sound is heard. I am having the same problem. Haven't found a solutions, 07/30/2019 by I have done the test with a torch and can see the pictures. If this is the case the inverter (if not a led tv) is bad. Just been watching TV, then suddenly, no more Picture, but Sound normal. Remove the EMI shield and lets see what is going on under there. We don’t really want to spend anything on this unit if we have to. Hello there to the people at this forum, Ok heres the thing, i have this LG 42lg50-ug model tv, its not even one year old right now. Repair guides and support for your LG TV. © LG Electronics. — Privacy — Terms — Accessibility through the surround sound but no.. 15 % still starting up do n't quite know what to do trying replacing all 3 boards I! The hardware is OK, i.e was thinking of trying replacing all boards. Turned the TV and check what happens does not pull up did same. The volume is set to Internal TV Speaker ” the back light and reward benefits from LG checked voltage! 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