I replaced sceen, now there's sound but no picture

I replaced the screen on this phone twice now with no issues. This last time, I replaced the screen & powered on to hear the intro sound on a black screen. I’ve checked all connections & even re-attached the old screen (which just had a “dead spot”). Could it be the motherboard? Is this something repairable?

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:02crwdne2944067:0:

Hello

I don’t know moto phone but with iphone it looks like a backlight destruction usually cause by a replacement with power available on mother board (battery still connected)

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

The battery was definitely unplugged when the part was replaced. I may have bent the component I plugged the screen into on the motherboard. Is there a way to get a specific part from the motherboard besides buying a used phone for the parts?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0