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Troubleshooting of mdvr failure to boot
Henry Chia
Possible causes of failure to start：
Check whether the SD card lock is closed
Check whether the vehicle key is opened
Pull out the SD card, then close the SD card lock, and power on again. Can it be started normally
After the button battery is pulled out, can it be started normally when it is powered on again
Check whether the power cord is connected reversely
Can another stable 12V power supply start normally
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