I downloaded and updated but no luck

((
I did the update 2 times following Mark's instructions. The first time it took around 10 minutes, then reboot and hanged. The second time it took around 2-3 minutes but the device still hangs.
What I'm experiencing seems a little bit different from the first post of this topic.
I have a FLASHING blu light and the reset function on the back of the device doesn't work at all. If I try the reset function the blue light stops flashing but the screen remain the same and nothing else happens.
The device was working with the pre-installed 1.6.n firmware.