Multi-port boards usually designate only one specific USB port for OTG flashing. Check your board's manual. Connecting to a standard USB host port will result in a detection failure.
If your device boots but you just want to flash new software, connect via ADB (Android Debug Bridge) and type adb reboot bootloader or adb reboot loader . 2. Install the Correct Rockchip Driver (DriverAssitant)
Add the following content to grant access to Rockchip devices:
If you’ve ever tried flashing a Rockchip device (like a Chromebook, TV box, or single-board computer) using on Windows, you’ve probably seen it: rkdevtool no devices found
Does the device , or is it completely bricked?
: If you previously installed drivers, click "Uninstall Driver" first, then click "Install Driver" to ensure a clean setup.
: When connected, the device should appear under "Class for Rockusb devices" or "Ports" as "Rockusb Device" . 2. Enter Maskrom Mode (Hard Reset) Multi-port boards usually designate only one specific USB
Click the button first. This cleans out any old, broken driver conflicts. Once uninstalled, click the Install Driver button.
If the firmware is completely corrupted, you must force Maskrom mode. Locate the eMMC or NAND flash chip on the board. Use tweezers to short-circuit the clock (CLK) and ground (GND) pins (or dedicated Maskrom test points) while powering on the device.
In Linux, the cause of "no devices found" is often a permissions issue. While the kernel may see the device, the software cannot communicate with it properly. If your device boots but you just want
RKDevTool only detects the device when it’s in or Loader mode — not normal boot.
Open the case and short the eMMC CLK to GND to trigger Maskrom mode. Right-click RKDevTool and select "Run as administrator".
The wrong USB cable, a faulty USB port, or insufficient power delivery can all disrupt the connection.
He grabbed a canister of compressed air, gave the port a sharp blast, and reconnected the cable. The Windows "ding" of a new hardware connection echoed through the empty room.
If blocked, restart Windows in mode and reinstall the Rockchip Driver Assistant. Summary Checklist Problem Area Driver Problems