TV Flashes green light 10 times, blank and vertical lines

I found this tv next to the dumpster in my student accomodation, its a 39 TH-L39EM5A, and visibly it’s in good condition. I took it inside and when its plugged in there is a solid red light until you press the on button, it then flashes green 10 times. The screen will flash white for about half a second, before going to a blank black screen, but its stil on. Coloured vertical lines will occasionally appear and dissapear for a few seconds over the screen.

I have a bit of technical experience with computer systems, but not TV’s/Monitors, so I decided to give it a crack. I unscrewed it and haven’t noticed any immediate issues, it all looks okay in the back, but I’m not too sure what I’m looking for. I found the old owner and he said he just discarded it because it wasn’t working, didn’t bother investigating it. I searched up some possible issues and haven’t found the same case anywhere, I’ve tried fixes like using a makeup brush and a vacuum and while it made it a bit more colourful, it didn’t fix the issue.

The previous owner said that it stopped working about a week after someone used some cleaning spray on the front.

I’m happy to spend a little bit of money on it, but if you could reccomend some other solutions aswell, that’d be excellent.