Chosen Solution
When I press the power button the fans spin, but no chime, nothing boots. I tried resetting pram/nvram and smc, both didn‘t work. Happend after a regular shutdown. No liquid damage, no burn marks on the board. Running Catalina. What is going wrong?
Disconnect the battery from the logic board. Disconnect the MagSafe adapter. Press and hold the power button for 10 seconds. Plug the battery back in, then the MagSafe. You should get a spontaneous reboot. MacBook Pro 15" Retina Display Mid 2015 Battery Replacement
