Green lines after battery replacement

I just completed iFixit’s Google Pixel 3 Akku austauschen guide. Upon powering my phone back on, I was greeted by the sight of beautiful green vertical lines.

I was wondering where I might have messed up; do any of the steps shown in the aforementionned guide present a risk to the display if done by a poorly skilled technician such as myself?

I ended up using some 99% isopropyl alcohol to loosen the pull tabs on the old battery. Could an excess of that be responsible for my current problem?

The problem “evaporated” on it’s own. I guess it was the alcohol, after all…