| Step | Action | |------|--------| | 1 | Use a (less than 1 meter). | | 2 | Plug into a powered USB hub (not directly into PC front panel). | | 3 | Disable USB selective suspend in Windows Power Options. | | 4 | In Device Manager → Universal Serial Bus controllers → for each "Root Hub" → Properties → Power Management → Uncheck "Allow the computer to turn off this device" . | | 5 | Clean Miracle Box USB port with 99% isopropyl alcohol. | | 6 | Apply dielectric grease to USB connector to prevent micro-vibration disconnects. |
: Ensure you have the latest Spreadtrum drivers if working with SPD chips. 2. Configure Windows Device Manager Reset USB Controllers : Right-click Device Manager Universal Serial Bus controllers , right-click each entry and select Uninstall device , then restart your computer to let Windows reinstall them. Scan for Hardware Changes : In Device Manager, click Scan for hardware changes after connecting your device to force a refresh. Disable Selective Suspend Power Options Change plan settings Change advanced power settings USB settings