Hello,
At the time of departure, 1 of the engines did not start.
I cut the other three and inspected the drone.
A capacitor from the ESC module melted.
I don’t understand how that could have happened. The last flight passed quite normally, it did not undergo shocks, and only flew in dry weather.
It is well sheltered in its bag.
I ordered another ESC module, but I wish I had a reason for melting this capacitor.
I attach a photo
Sorry for my bad English