My cat knocked over the monitor. It turns on fine, but the screen has a thick green line that covers about a 5th of the monitor. Is there a way to replace the panel? I know, this might be a long shot
the panel can be replaced, but replacements may or may not be available and the price may or may not be reasonable. try pulling the thing apart and getting the part # off of the panel and checking Ebay. I've had good luck finding replacement panels there before.
what monitor is it? unfortunately panel replacement is not easy to do yourself and probably not worth it either. you might be better off just buying a new monitor.
My 32" 4k Dell display got smashed when my window got blown in by strong winds. That was a $1300 lesson in home maintenance, but even that wasn't worth getting repaired.