usage: fix meaning “to repair,” which is probably an Americanism, is fully standard in all varieties of speech and writing. fix (to) meaning “to prepare, plan (to)” is another Americanism: We're fixing to go to town.
If you are using a Windows 11 device, start by running the automated Bluetooth troubleshooter in the Get Help app. It will automatically run diagnostics and attempt to fix this Bluetooth problem.
To fix is to fasten in position securely or to make more or less permanent against change, esp. something already existing: to fix a bayonet on a gun; fix a principle in one's mind.