If you have the RK3229 Leadcool andorid tv box .
when the box can not run after you plugin power .the screen stuck on the Andorid robot .
you need flash the box by this way
Please download the firmware and tools on here
1.Dual Male USB cable line
2.Small tools can press the reset button
Before you flash the box .please contact the selller check your box CPU .
here is the video