To flash firmware, your device must be in or Maskrom Mode . Power off the device. Hold the Recovery/Reset button (usually a small pinhole).
Right-click on the list to "Add Item" or "Load Config" if you have a parameter file. rk android tool 271 download install
Check your USB cable or reinstall the Rockchip drivers. Try a USB 2.0 port instead of 3.0. To flash firmware, your device must be in or Maskrom Mode