| Symptom | Solution | |--------|----------| | USB disconnects during write | Short, thick cable + powered hub | | “Device not found” in Miracle Box | Use USB 2.0 back port | | Random clicks/reconnects | Disable USB selective suspend | | Still fails | Reinstall driver via Zadig (WinUSB) | | Power fluctuation | Powered USB hub (5V 2A minimum) |

Reinstall fresh drivers, ensuring they are compatible with your specific operating system (especially 64-bit systems which often fail to detect MTK Preloader drivers).

If you are handy with a soldering iron, open the Miracle Box case.

For 90% of users, (removing hidden/ghost drivers) fixes the instability. Always try to use a USB 2.0 port (usually the black USB slots on your PC) rather than USB 3.0 (blue slots), as older diagnostic boxes often struggle with USB 3.0 controllers.