The damage is vertical and horizontal lines and now the tv has a black screen
No it looks like you need a new screen.
At only 7 months old have you any cover for repairs.
SOURCE: 50" LG Plasma - Thin red vertical line in middle of screen
I work for a auth LG service center and each time I have had this symptom we had to either change what called the T_CON control board or the Plasma display panel itself. You need to cocntact LG @ 800-253-0000 report your problem and they will find a service center in your area you should have 1 year warranty parts and labor.
SOURCE: I have a lg 50px1d 50
Sounds lik a bad buffer board. you will probably have to have a tech replace it.. could be big $$$. get an estimate first.
SOURCE: I have a LG 50PX1D-UC plasma TV with a black vertical line
You could have a Driver Board that has a loose connection or a Ribbon Cable that has a intermittent connection to the Plasma Panel, or a defective Plasma Panel. Either one could cause the problem and I would recommend only a Qualified Service Person to check it out.
Here is LG's Customer Service Number. 1800-243-0000. They could direct you to a Local Service Facility.
I hope this helps,
Sky Assoc
SOURCE: LG LCD TV - Buzzing Sound and Faint Horizontal Lines
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.
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