First you need to try this:   Bugs or limitation NAND install sometime fails. Dirty but working workaround: install Lubuntu to NAND with Phoenix tools and run install again. Shutdown results into reboot under certain conditions. Due to bad PCB placement, there is some crosstalk between Wifi and VGA in certain videomodes (Cubietruck)   If things fail, like in your case, you need to use those proprietary Phoenix tools to fix NAND. When this is done, you can install with our tools.