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Chip is the cx1117-5.0, datasheet says its a low dropout voltage regulator, which makes me think there's an issue with the BEC on these chips like I said, this is all wizardry to me, so I might just be grasping at straws here

ESC will reach about 125 degrees Fahrenheit (measured with cheap IR thermometer), before getting unplugged, might go higher but I'm trying not to kill the ones I have left

as long as my assumption that red goes to red and black goes to black is correct

Might also be worth mentioning that if I have all of the ESCs connected to the flight controller, I have no beeps. However if I disconnect the bad one, I get beeps from the working ones. The same happens if I completely disconnect the flight controller.

Ive been trying to get my 250 build off the ground for about a month now. I threw it together, connected the battery, everything beeped appropriately (and all motors twitched). Disconnect battery, hook up flight controller and programed through Openpilot, get to the ESC calibration and I have no...