I have made sure all plugs are securely in. Sometimes it doesn't black out for over 15 minutes, but then every 2 minutes again. I can still barely see what's going on when it black out, and the sound is always there. Please help. Thanks.
It may be the roku it self - test this out by using another device on the tv- if it is roku replace it as its not normal- it truly sounds like your backlight is not operating- if you can see a picture but its just black or very dim then the back lighting would be the issue- this should not have anything to do with cable.
good luck
https://www.6ya.com/mrmmike
SOURCE: TV SCREEN GOES BLANK
Yes your inverter is bad, I have the same problem my set is about 1 and 1/4 years old. Because Olevia makes a terrible product there inverters are attached directly on to the panel, which means they will only sell the inverter along with the panel i.e $700+ to replace + $100 dollars labor if u don't know how to fix it ur self. I am currently searching to find the manufacture that makes the inverters because olevia will not disclose that information. I believe it is darfon, if so the inverter should cost about $150-200 depending. If you dont believe you can fix it ur self ur best bet is try and sell the set for scrap take ur $100 or so dollar and buy a quality product! Oh and dont call there support they will tell 10 different things before u find out this long for seen truth!
SOURCE: tv turns off after 15 minutes of use
For bobby11 and luis, it is the power supply. Part Number EAY34797001 in the 42" and EAY34796801 in the 32". This is a known problem, and somebody should start a Class Action against LG over this one. Part is available online and easy to swap out for anyone with the most basic knowledge.
SOURCE: Sharp LC-46SB54U Keeps losing picture intermittantly
i believe your tv is getting overheated, possibly from dust getting onto the electronic components inside. or the inverter board for the lcd panel inside is going bad, alot of times it is the capacitors on the lcd inverter board going bad.
SOURCE: Toshiba tv screen goes black every 5 minutes with sound still on
Is it ok when you watch regular TV thru the cable or sat?
SOURCE: The LCD TV (LG 42LG5000) which is now about 15 mon...
The backlight inverter is dropping out, on the older lgs the backlight inverter is separate from the power supply, if this is the case you can only obtain it with a new panel.
otherwise the newer lgs have the inverter built on the power supply.
in this case you can replace the entire power board.
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