If the basic steps fail, you may need to reload the operating system: KeyONE stuck on the Fastboot menu - CrackBerry forums
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How to Fix a BlackBerry KEYone Stuck in Bootloader Menu Discovering your BlackBerry KEYone trapped in the bootloader menu can be frustrating. This screen—typically displaying the Android mascot alongside technical text like "FASTBOOT MODE"—means your device cannot load its main operating system. Fortunately, this is a common issue that you can often resolve at home. blackberry keyone stuck in bootloader menu top
This issue usually stems from a minor software glitch, a stuck physical button, or corrupted system firmware. Fortunately, you can systematically troubleshoot and resolve this issue at home. Understanding the Bootloader Screen
On the bootloader screen, use the to navigate through the options at the top. Highlight Recovery Mode (or RECOVERY ). Press the Power button to select it. If the basic steps fail, you may need
Extract the contents of the Autoloader zip file into a folder on your computer.
In the Android Recovery menu, use the Volume buttons to highlight . Press the Power button to confirm. Fortunately, this is a common issue that you
for at least 30 seconds. This can force the device to cycle out of a software hang. Menu Navigation : If the menu is visible, use the Volume Down keys to highlight "Continue to boot up" and press the Power button once to select it. Check for Stuck Buttons