About 4 days ago my laptop started to show neon green lines on black areas when i booted up. So I looked everywhere online to see what it is and it could be a loose cable, bad motherboard or bad gpu. However, a few hours later it went away and it has been fine since then. but today, I was playing magic on steam when I notices the blacks slowly became green until the entire screen was filled with neon green (the games background is almost all black). I hope it isnt anything serious but I want to know if anyone knows how to fix it so I dont have to RMA and not have a laptop for 2 weeks.