You must install the "RK Driver Assistant" first. Without these, your PC will not "see" the device in Loader or Maskrom mode.

Check your USB cable or reinstall the Rockchip drivers. Try a USB 2.0 port instead of 3.0.

Path each partition (Kernel, System, etc.) to the corresponding .img files on your PC. Click .

Write specific partitions (Boot, Kernel, Recovery) or full images. Device Testing: Check the health of the NAND/eMMC storage.

To flash firmware, your device must be in or Maskrom Mode . Power off the device. Hold the Recovery/Reset button (usually a small pinhole).