Black lines on the screen

I messed up with my LG G2 D802 and i need help because i believe it's a software problem.

When i was installing the latest cm12.1 nightly, after trying a few other roms, i also installed, by mistake, an old jb bootloader/bootstack.
As result the phone entered in Bootloop, but not a normal bootloop, on the screen start appearing some crazy interferences and then the phone boot up, but the screen not. The phone made sounds and the touchscreen work, but the screen was black/off.
I've managed to solve the problem with an unbrick method, but now i have a huge problem: the screen, on the rigth side, from the top to the botton has 6/7 black lines. I have no idea how to solve this and if is a hardware problem ... I've read it's an kernel problem, not hardware, but don't know how to solve the problem :/

Picture:
https://meocloud.pt/link/58d13900-ff...16_020454.jpg/

Horizontal lines lg g2 screen

Hi I just got my new LG G2 about a week ago, but I noticed there are these small barely visible horizontal lines across the screen, but they only appear in certain applications, specially when there's text or white objects contrasting darker backgrounds, lines appear to come from the text and or objects and extend thru them like the objects are sending them sideways is very weird, immediately I thought the screen came bad but I've been thinking it could be a software issue because as I said, most of the time they are nowhere to be seen like in the lockscreen or when playing games, in those screens the display just look gorgeous and has no issues, its only in certain occasion that you can see them, has this happened to anybody else and do u have any idea on how to fix it with software? or is the display just bad and I have to return the phone? I imported it so it would be a real pain to send it back for a refund.

EDIT: apparently I cant upload images larger than 256kb WTF? the last time I took a 256kb picture was in 2005...

the screen shows vertical lines

Hello,

For some time I have a screen problem when the phone heats up, the display shows vertical lines and I have my phone let stand until cool, but today I was travelled and my phone was exposed to the sun while I was using, and when it was heated, vertical lines appeared and when I touched the screen, nothing happened, I turned off the phone, remove the battery and put back and even now I can not use the phone, when I turn the screen I use, a few moments later, the screen colors change as if the screen had melted. I've got TWRP RECOVERY, when I go into the recovery, I can not touch options, I have to flash CWM to be able to handle with buttons volumes. What's the problem ?