Disconnect all power cables and data lines from the Rockchip target hardware.
Double-check your hardware model. Do not attempt to flash RK3399 firmware onto an RK3288 device. rkdevtool v2.69 download
: You can find a comprehensive archive of current and legacy versions, including v2.69, at the RKDevTool Download Portal Alternative Mirrors : Sites like Radxa's Tool Index Disconnect all power cables and data lines from
Warning: rkdevtool is firmware/bootloader tooling for Rockchip devices. Improper use can brick devices. Proceed only if you understand the risks and have verified the file integrity. rkdevtool v2.69 download
: RKDevTool is typically distributed by board manufacturers. Official documentation for boards like the Radxa ROCK 3 and Radxa ROCK 2 provides direct links to these tools.
Bad USB connection or corrupt partition configuration.