She loaded the firmware file. The flash tool, BurnCardMaker , was in broken English. She unchecked “erase bootloader” (a guess) and clicked .
Where to get official firmware
Summary
MECOOL KT1 Firmware: The Ultimate Guide to Updates and Optimization
If you're experiencing issues with the device's built-in update feature, you can use the Mecool KT1 firmware upgrade tool:
The safest method. It preserves your data and uses the built-in system tools.
The screen stayed black for ten seconds. Fifteen.