This page suggests solutions to your technical problems.
We need to change the input setting in order to give power to your external microphone.
2. Scroll down the wheel button and select “input” by pressing the wheel button.
3. Scroll down (use the wheel button) and select the “plug-in” option by pressing the wheel button.
4. Select “on” for “plug-in power”
5. Press the “menu” button to go back to your recording screen.
6. Now you are all set!