Nokia N810 and fscked charging subsystem

Today I took my N810 from charger when it was displaying “Battery full” message on charging screen. Then I tried to power it up. It refused to boot…

OK, lets take battery out for some time and insert it back. Still nothing. Connected it back to the charger — no reaction… even “Charging” message is not displayed :(

I wonder how it happened. Device is new so battery should be working nicely. Did Nokia fscked charging subsystem? But it is their 3rd tablet so it should not be a reason…

n810 nokia