Why is my touch screen not working?

I recently replaced the motherboard on my Pixel 3 because of power distribution issues. The replacement motherboard came out of a fully functional Pixel 3 with broken front and back glass. I followed the instructions from this website to the letter. The phone powers up, but the touch screen function does not work.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1

crwdns2942205:01crwdne2942205:0:

I met the same issue, I don't believe this is a hardware issue as the touch screen work very well with the old mother board before I replaced it.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0