How to fix when none of the motors turn on my TEVO Tornado?

It’s not very common to have all the motor not turning but it’s possible. Please check all the cables and all connections.
Make sure that the motor cable wires are in the correct order.
Inspect now all the drivers if there is anything visible and all plugged in. Make sure the drivers are installed in the correct orientation.
Check the Vref of the drivers.
Replace (or swap) one of the drivers to troubleshoot if the driver is working.
Next do same with a motor – replace (swap) one of the motors to troubleshoot them.
Last step is to flash the firmware new.

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