I hate to join the group here, but my new n810 is also unable to start AT ALL after the Diablo update. I ran the update, booted successfully, used/customized it for a few minutes, shut it off, and the next morning, nothing. No charge light, no charging, no screen activity at all with power button or any combination with the power button.

I have an E71 as well that takes the same battery, so I've charged two batteries, both of which work with the E71 but neither of which have any impact on my n810 situation. When fully charged, nothing happens on the n810, again no lights or screen.

If anyone knows anything about this fix since July, please let me know.