Unable to Power On RadioMaster Device— Removing the Button Battery

If your RadioMaster device is not powering on, removing the coin cell (button) battery to reset it is a common and effective troubleshooting step. This method can resolve issues caused by internal memory or power-related glitches. Follow the steps below to perform this reset safely and correctly.

Solution: Remove and Reinsert the Button Battery

Why This Works

The button battery powers the device's internal memory, which stores settings and configurations. Removing it for an extended period allows the device to fully reset by clearing this memory. This can resolve issues preventing the device from powering on.

Important Note: Accessing the Button Battery

It is necessary to open the controller shell to access the button battery. This battery is on the main PCB inside the radio, and the case must be opened. Fortunately, RadioMaster devices are designed to be easily opened by the end user, and this process is straightforward. However, please go ahead and take care to avoid damaging any internal components.

Reset your RadioMaster device by removing its button battery.

Steps

  1. Turn Off: If possible.

  2. Open Shell: Unscrew with a Phillips screwdriver, and gently separate the panels.

  3. Remove Battery: Take out the button battery (e.g., CR2032).

  4. Wait: 1 hour (or 1-2 minutes for quick reset).

  5. Reinsert: Place the battery back (positive side up).

  6. Reassemble: Secure shell, power on.

Precautions

  • Please handle the Battery carefully: You can avoid touching the battery terminals directly, as oils from your skin can cause corrosion.

  • Be Gentle with Internal Components: When opening the shell, be mindful of any delicate parts, such as ribbon cables or connectors.

  • Check Battery Orientation: Ensure the battery is inserted with the correct polarity (positive side up).

  • Secure the Shell Properly: When reassembling, make sure all screws are tightened securely but not overly tight, to avoid damaging the threads.

Additional Troubleshooting Tips

If removing the button battery does not resolve the issue, consider the following potential causes and solutions:

  • Check the Main Battery

    • Please make sure the main battery is fully charged and inserted. A faulty or depleted main battery can prevent the device from powering on.

    • If possible, test the device with a different, compatible battery.

  • Inspect for Power Surge Issues

    • If you suspect a power surge from the USB connection (e.g., when connected to a PC), disconnect the device from any power source and attempt to power it on using only the main battery.

  • Reflash the Firmware

    • If the device still does not power on, you may need to reflash the firmware. This can resolve software-related issues that prevent booting. Refer to the RadioMaster Firmware Update Guide for instructions.

Conclusion

Removing and reinserting the button battery is a simple yet effective method to reset your RadioMaster device and resolve power-on issues. By following the steps above, including safely opening the controller shell, you can perform this reset and potentially avoid more complex troubleshooting. If the issue persists after trying this method and the additional tips, don't hesitate to get in touch with RadioMaster support for further assistance.