There is a faint line in the bottom half of my LG tv lcd screen

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

I hate to give you bad news but I believe this will be a panel issue and it's not going to be fixable. You can try a different tcon board but I don't think it will help

If you wish to get some details; just Google for the site "Elelctro help". Pull up older posts. Surf the site with patience.
Line, faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent.

IMO Seriously for $119 it's not worth it.
However, it does sound like a capacitor problem
If you are "Serious" about fixing I'd find a TV repair Forum.
Else I'd go here and get a new one.
https://www.walmart.com/browse/electronics/32-inch-tvs/3944_1060825_2489948_7156390
Best Wishes.

T con board is responsible for the image you see on screen as well as any anomalies.

If you wish to get some details; visit the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

makes a difference where this line is... very top, top, middle, bottom, very bottom? also, is this set new to you, or has it been fine for a while, and just started doing this? does the line stay there when you switch to other inputs? (like a dvd player or a gaming console)? this kinda stuff will help you get an answer that makes sense - good luck

From your description, the sound you are hearing is the inverter(s) that drive the back light for the LCD screen/module.
The inverters mounted on the back side (one lower right and one left side) of the LCD screen/module. They are under the sheet metal cover/shields.
The inverters are going out and or the LCD screen/module is going bad too.
That LG TV has only a 1 year on parts and labor from the date of purchase, but you could call LG and ask for their help for such a new TV. They might do it under a warranty, for little or no cost to you.
I hope this information has helped you.
Good Luck.

On a LX2R to remove the green bar at the bottom or the blue bars on ths side using the sky HD box go to menu and the pip menu at the bottom of the list, access input and make sure the HDMI input is on DTV and NOT PC.