Watch is on, can be seen as paired with my phone, but screen is black

Watch is on, can be seen as paired with my phone, but screen is black

My watch screen popped open. So I was trying to clean the adhesive and reseal it. Don’t know what I did, I realized that screen went black. I tried to ‘hard start’ by holding both the bottom and dial for 10 seconds. Screen is still black, but Watch can be seen as paired with my phone, is on and can be charged. What’s wrong? Which part needs to be replaced?