After replacing LCD, the screen lights up but no picture

I dropped my MacBook air and broke the left hinge, Shortly after that my screen was turned a blue hue. I opened it up and found the LVDS cable was frayed and then my screen went from all blue to completely large pixels. I replaced the LVDS cable but when I reboot the screen lights up but no image. I can get an external screen to work. Going into displays only shows the external display. I purchased a new MacBook air top complete with wires attached but got the same issue. Is my video controller in the laptop fried?