LG 37LC7D LG - model LG 37LC7D The TV turns on and works perfectly for a random amount of time then suddenly I hear a loud popping noise. The screen goes black (backlight is on, but no picture) and the audio turns off. After pressing the power button several times, the TV will finally turn completely off. When I turn it back on the TV works fine for a few minutes, but then the same pooping noise happens and I am left with no video or audio. Please help! Thank you.

Is there a person in your environs who is mischievous or prone to malfeasance? Someone may be using a TV-B-Gone on you. Check this out:
https://cornfieldelectronics.com/tvbgone/tvbg.home.php

does the power indicator blink? If so thats an error code let me know how many time it blinks

My lg 37lc7d is having the same problem. My backlight is on but no display. Also the standby light blinks several times then the screen goes on but it's just all black. No a/v

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; [Exclude the model number], in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Pop could be lamp.

Ur tuner board is dead.Replaced this board to get picture back.Tries Shopjimmy.com,Ebay.com for the board part.

you have blown an internal fuse you might be suprized to learn that ther is someone veryclose to you who might be able to fix it a lot of people who fix tv's work from home bassically you just neeed ot repalce a small circut board inside it

just google and try to find them

take tc back it should sill be under warenty if they refuse you can say t othem this is not fit for its purpose and force them to fix or replace it

I just had this same problem over the weekend. Is your TV hooked up via HDMI?? Mine was and i've been having problems with the tv image shrinking whenever i turn on the tv, so i would have to change the channel 1 or 2 times for the image to come up normally. On Saturday I went to change the channel and then all of a sudden I hearld this loud pop and when the image came on it was just a sky blue screen, I couldnt see anything, but I could hear the channel. So I disconnected the HDMI and hooked up the tv with component cables I had and now it works fine. I ordered a new HDMI cable just to see if it will work again. If not, i'm calling Olevia.

 I heard that Best Buy is still selling these models despite this known problem- I am trying to have mione fixed but was told the replacement part is on back order until DECEMBER!