The mode identifier "BR23UBOOT1.00" surfaces in two primary situations for average users. Understanding these scenarios is the first step to diagnosis.
Legacy microcontrollers often struggle with the power states of USB 3.0 or 3.1 (blue ports). Plug the peripheral into an older black USB 2.0 port .
A stuck button or a short circuit during power-on might have triggered the manual "bootloader" entry.