Read the reason before changing the rules
Betaflight can report arming-prevention information. Use the interface and documentation for the installed firmware to understand the displayed reason. Different versions can present details differently, so match the reference to your own system.
Start a safe bench investigation with the documented precautions, including removing propellers for configuration and motor-related checks. Do not work around an arming block by repeatedly trying to launch in a different place.
Turn a flag into a question
A receiver-related warning points toward valid control input. A throttle-related warning calls for checking the displayed channel and the intended arming conditions. A configuration connection can itself be relevant to an arming block. Read the exact flag definition instead of guessing from a shortened name.
There may be more than one active condition. Resolve them systematically and observe what changes. The goal is to understand why the system refuses to arm, not to make the warning disappear by changing unrelated limits.
Check the inputs you expect to be true
Verify the selected radio model, documented receiver configuration, relevant switch behavior, and the displayed control inputs. Check that the aircraft’s configuration corresponds to its actual hardware and intended modes.
If the aircraft previously worked, identify what changed: firmware, a receiver setting, a radio model, a repair, or an impact. That history is a better starting point than a fresh set of random defaults.
Keep protective behavior intact
Do not disable safety features or apply someone else’s configuration just to force an arm. If you do not understand the reported condition, consult the official documentation or provide a clear, private-data-safe support description.
A good support question includes hardware identity, firmware version, exact flags, what you expected, and what you already checked. Keep secret binding information and sensitive configuration data out of public posts. A precise question often gets you closer to a solution than ten screenshots of unrelated tabs.
MAKE IT USEFUL
Your next small job.
Record the exact arming-prevention message and its definition for your firmware. Follow that clue before changing any setting.
Go straight to the source.
These official resources support the next step. Hardware, firmware, and local requirements can differ.