A: No. 9 balance car has not ridden for a long time, and does not turn on after charging for the following reasons
Failure one, idle too long can not open the machine, the cause of the failure, the battery is over put, the motherboard is damaged, etc., can be repaired, can be replaced,
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Fault two, only a period of time of no use can not open the machine, charging did not respond, the cause of the fault motherboard problems, can be repaired,
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Fault 3, normal driving suddenly reported error 22,18 and other fault codes, fault cause maintenance,
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Fault four, the sudden power off on the way up the slope, and then the boot did not respond,
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Fault five, normal boot, instrument error, sometimes good and sometimes bad, the cause of the fault, throttle or brake sensor damage.
That's because the battery went dormant. Keep charging until the battery is activated and fully charged, and you can turn on normally.