Ok, so I decided to follow this tutorial by DIY Perks: And try to make a DIY Laptop monitor from an old Laptop screen. I started by salvaging a 12 year old laptop that still worked but was so slow it couldn't be used. It was an HP Compaq computer (can't remember what it was called). Then I bought a controller board for it, and when I plugged it into my laptop (an HP Pavilion x360 I think) via HDMI the screen didn't turn on and the LED indicator kept flashing Green (on), red (off, but receiving power), and no light (completely off), so then I tried just plugging in the backlight to the controller board and it worked fine. After that I tried using a VGA cord connected to a different laptop (a Toshiba Sattelite L505) because my laptop doesn't have VGA in, and I could tell the LCD Screen was receiving a signal because when I changed projection from Extend to duplicate both computers flashed off and then back on, but the LCD Screen still only showed the backlight! And that's when I decided to make this post because the screen worked when it was connected to the laptop, but for some reason it doesn't now. Maybe it's a controller board problem? Anyway, any help is appreciated!