Did you ever get it to work? This happened to my N8 about 2 weeks ago!
My phone went to zero one night, I plugged it in, got a small lightening bolt, but not the usual charging dial. I didn't think much of it, went to do other things, a minute or two later, I heard it vibrate/buzz a could of times (thought that's wierd, it's not booted), went to look at it, and it was dead. Just like the yours, nothing would revive it, it was dead dead.
I wound up replacing it under warranty. The problem with warranty is you get recycled/rebuilt phone. I had to reload all my apps thru the PlayStore because the activation process is flawed. When you get to the step where it reloads your apps, the screen just goes black and the phone locks up; I had to hard reboot. After two retries, I skipped this step, and went thru the PlayStore.
Luckily, I use Nova Launcher and had backed up, and was able to get my apps & screens reorganized quickly
Maybe somebody can help me out. The biggest pain with a new phone it all your android settings are gone, trusted places/devices, security settings, VPN, etc. If there's a way to completely image all your settings, I'm not aware of it.