Screen now not working

Screen now not working

I have just used the ifixit kit to repair the swollen battery in my Apple Watch. Unfortunately when i’ve put it back together, but before sealing the screen, I now have a screen which does not display the apple logo or other stuff. Instead it’s just a mess of multi coloured pixels. Have I broke the screen or is this damage to the rest of the watch, or have i just not put it back right?