Lines and squares on my screen

I bought a new (used) display and digitizer from ifixit for an Ipod 5g. I had originally just purchased the replacement glass, but in the process of cleaning the old adhesive off the screen, I got cleaning fluid inside the display, and (at least I thought) ruined it. However, I'm seeing the same thing with the new display that I saw with the old one when I tried to fire it up - lines (foreground) and squares (background) on the display, and the touch screen seems to not work where those artifacts appear. Now the strange part - I can futz with it and get the artifacts to be in different parts of the display. Is there some other component that likely stopped working during the repair process, or did I just receive a bad display, so they're both toast? Or do I have a loose connection somewhere? Or...?