Chosen Solution
I did a self repair on my Apple Watch series 4 the back glass was cracked and I replaced it everything went fine except when I put everything back together I get no apple logo or haptics when trying to turn the watch on I have checked the battery connector and held the lock button and Digital Crown for 30 seconds but still nothing. Any help would be appreciated.
Check the battery connector and the ribbon for damage, check the board connector for damage and any knocked off components.
