Unable to boot

After the camera is turned on, the LED light shows no display or display of the LED light, indicating that the BLD is not normally started, may be the hardware cause, or the battery cause, or the BLD is lost.

If boot flash three times of blue light, it is triggered into fw updater system, if there are upgraded file card, the flashing blue light upgrades, if the card does not upgrade file normally on blue light waiting in the update file.