When i go to arm my pixhawk quadcopter it makes a repeating error buzzing sounds and doesnt let me arm or anything.
Sounds like you got a prearm error.
Sorry, but a better diagnosis isn’t possible with the current amount of fault description.
Remove the props, connect to mission planner and try arming on the workbench. Then report what prearm error mission planner gives you.
Alternatively set LOG_DISARMED = 1, reproduce the error and upload the .bin log file.
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