Notebook Video, Display and Touch

Hi

I know it's not a Gaming Laptop but since 4 or 5 years ago I'm playing video games with my laptop at least 10 hours per day, every day until now.

and the laptop was working very well (Thanks to HP o7).

since few days ago I saw a tiny horizontal black line bottom of my screen.

it was growing day by day (like that snake game when the snake eating the cubes becoming longer and longer slowly) (horizontal, from left side to the end of right side, then went one step upper and then from right side to the end of left side and so on, coming upper and upper)

like a worm eating a leaf.

I made the screen green to be more visible

then I went to BIOS to make sure it's not about the Graphic Card and make sure it's a harware issue

and I saw yes it's still there even in my BIOS screen.

my laptop screen never and ever been damage or scratch by something, I have never throw water, tea or coffee on the screen.

I turned off the laptop to open the screen panel and make sure everything is ok with cable and it's connected to the board correctly. but when I turned off the laptop and opened the screen i saw those lines are still there even when laptop is completely off and with no battery, (even I hold the power button for one minute)

(zoom in and look carefully inside my red mark)

it's make me crazy especially while I'm playing games, so I took a cotton buds (like those things for cleaning ears) and tried to wipe those area on the black lines with a bit pressure, then i saw they are moving around.

then I tried to guide them and force them to get out of the screen by wiping them with pressure to the corners.

didn't work that way and I did just mess them around.

then I turned on the laptop again and now I'm seeing this:

(I put the red and white backgrounds with some "pixel healer Apps" to make those black spots more visible)

as you can see it was a straight lines before and was growing longer and longer day by day, but now it's not look like line anymore, now they are like black spots, at least they are not growing anymore and their size is same during last few days.

I have 2 questions:

1) is there any way to fix this problem or not at all? (anyway my laptop is out of warranty)

2) what is the causes of this issue? as I said before I did realy care of laptop, my laptop screen never and ever been damage or scratch by something, I have never throw water, tea or coffee on the screen !!!

Thanks in advance.