I already tried reflashing it but N900 just stays silent (no lights or annything else) tried with and without battery, tried plugin usb before battery, tried with and without simcard)

I tried leaving it charging all night but there is no change

I tried charging battery with another phone (5800) but N900 still stays silent.

I tried removing battery and pressing power button for a few seconds. (with/without wall charger pluged in)

As i sayed i tried on USB and wall charger (tried 2 different wall charger and 2 different batteries) but didn't change annything

I still don't understand how it happened as i just left N900 running out of power and shut down. Since it happened i cant power it up / charge / flash

As i said it seems to be dead. I didn't have time to get it back to Nokia Care today, i'll tell you when i know more about this problem