If your RunCam 5 keeps flashing blue or blue and green at the same time, please try below ways to figureo ut the problem:
1.Make sure your SD card is a high speed card of C10 or above, like below ones:
2. Make sure there is no other configuration file or programme file in the SD card. Thus you may format the card to FAT32 before you insert it into your camera.
3. If the problem persists, please flash the firmware by referring to below link:
4.If nothing helps, please send us a video illustrating the problem and provide us your invoice with ordering date to our email: firstname.lastname@example.org.