How did the flash stopped? I mean what caused it or what do you think caused it?
Anyway, have you tried to reflash your board with Flash Tool Lite? If you haven't, you can find the tool itself and a guide on how to use it on Intel® Edison Downloads.
Try it and let us know if it helps.
I successfully recovered my Edison with Intel Flash Tool Lite.
I thought it is equivallent to flashall.sh, but it wasn't.
And, the reason of brick was been revealed that the flashing image was bad.