Hi @Alejandro-M
It's highly likely the ESC or Power Module board was irreversibly damaged from this configuration (normal lab wall power supplies cannot power a drone without near certainty of failure).
If there is a short on the +5V_DCIN to GND, you can easily observe that, but the other failure mode could be an open circuit which will not show up on a DMM easily.
Your best course of action may be an RMA with us so we can explore the drone and find the failure(s) and offer you replacement options to get this platform back up and running.
https://www.modalai.com/pages/rma
A