Blank White screen after LCD replacement.

So I just replaced the LCD panel on a broken Macbook pro and it seems to work, only problem is that now when turning the laptop on it chimes, and sits on a blank white screen. No apple logo or loading animation. What would have caused this and what can I do about it. The previous LCD panel had lines through it but apart from that it still worked so it wasnt an issue before. HELP!

EDIT:

I think I must elaborate on the issue, The LCD panel seems to work fine but when I turn on the machine, I hear a chime, the keyboard backlight turns on and I am able to change the screen brightness. But I see nothing on the screen itself. It is just a blank white screen without an apple logo, loading animation or anything of the like. I have attempted to see whether the LCD will work on another MacBook Pro, which was working perfectly before, but now the issue is happening on that machine also. Even when I put the original LCD in it. The SSD I had in the system did not move during the LCD swap so I don’t think the SATA cable has anything to do with it on the other machine, the one that I was fixing, maybe.