NexiGo D90 4K Mirror Dash Cam with Dual Sony Sensors

Please check the following:
1. Ensure the power cable is firmly and fully attached.
2. Make sure the socket of your vehicle's auxiliary power outlet is clean and free of corrosion or deformation.
3. Make sure the power cable is firmly and fully seated in the auxiliary power outlet.
4. Ensure that the car fuse for the auxiliary power outlet has not tripped.

Step 1: Double-check to be certain that a Micro SD card is inserted into the device.
 Step 2: Please replace the new Micro SD card or format the Micro SD card.

Option 1: Replace the Micro SD card with a new Micro SD card.
Option 2: Back up the old files from your Micro SD card regularly.
Option 3: Format the Micro SD card once a month to keep the device running normally.

Option 1: In the NexiGo Dash Cam manual, navigate to Setting ＞ Storage ＞Format Micro SD Card
Option 2: Using a computer or laptop, follow the instructions provided by the OS manufacturer to format a disk.

Option 1: Restart the dash cam by pressing and holding the Power Button to turn the unit off. Press it again to turn the unit back on.
Option 2: Using a pin, press the Reset Button. The device will turn off and turn back on automatically.

Please go to the preview interface and check if you can see the image from the rear camera.
1. If yes, please verify whether the red trigger wire on the rear camera extension cable is electrically tied to the reversing lamp positive lead.
2. If not, please check all of the connections leading to rear camera to ensure that the camera is plugged into the system. Or reboot the device. If it still doesn't work, please contact our after-sales service.