Hello,
May I know how do you power the dashcam? use a hardwire or the supplied car charger? through the GPS mount or the USB port on the camera body side? You can try another way to power it.
If it doesn't work, please try to upgrade the firmware and reset the dashcam. I'm attaching the latest firmware for A129 Duo. You can upgrade it by referring to
this link. After the upgrading, remember to manually default the settings in the setting menu, and then press and hold the reset hole for 5 seconds.
Please let me know the result. Thanks!