Flashed the wrong firmware onto my MX10, after searching found that I had to short the eMMC to hard reset the device.  It explained about the two copper pads, but the picture was not the same model as the MX10, so i am adding photos here for future reference.

** perform this fix at your own risk **

Steps

REMOVE ALL CABLES FROM THE BOARD

Remove board from MX10 case, screws are under the cases stick on feet.

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Top of the board
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Bottom of board

Locate the pins on the picture below

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The pads you need to short

Plug the USB cable into Port 4 of the board.

Short the copper pads indicated with a piece of wire, fine point tweezers etc and then plug the other end of the usb cable into the computer.

You should hear your PC’s usb device connected sound.

I am using FactoryTool1.6 and the Device Type in the software is now indicated as maskrom

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You should now be able to select the correct ROM image, select upgrade and click run.