Chosen Solution
Missing all 5 (+1) screw being careless when taking MacBook apart but now it won’t power on and all cables are attached. Are all screws on logic board required for power to happen or am I missing something else? Update (01/15/2021) Is there something missing
Yes, you do need to mount the logic board fully. There maybe one or two mount points that could be left un-mounted. I’m sure no one has made a detailed study on which ones and if its safe to do (don’t play Russian roulette). Here’s the needed screws MacBook Pro 13" Screw Set - Logic Board (x5) You talk about a sixth screw Using the MacBook Pro 13" Two Thunderbolt Ports 2019 Teardown can you point it out. Update (01/15/2021) Looking at the guides I do see you lost the insulator