U no I have had a little trouble with plugging in the usb adapter and it getting recognized by the pc. Sometimes I have to unplug and replug it in several times before it offers me mass storage mode or the other one. Sometimes it just isn't recognized at all. And I suppose if thats true it is probably not charging then either.

Maybe your port is just bad, or maybe its like mine and just flaky

thanks everybody, i think i am just going to order a replacement and exchange it. bummer.

happens to me sometimes.
remove the battery, unplug the charger and reinstall the battery back again.

Have you tried taking the batterry out and in again? Helps when the device was uncharged 'too much'..

That is an odd issue for it to not work on neither 240v or USB charger. Sounds like you might have a dodgey mini USB - You tried removing the USB lead in PC, putting it in another port then attaching the N900 again? Try that, it's a long shot. Also try wiggling the cable whilst it's in the port. the port on my N97 was a bit flaky and doing this seemed to bring it to life.

i got the same problem here...

my N900 is about 2 weeks old..
i charged it many times..
but today.. i plugged it in at my PC, but nothing happend,
no green light, no messages appears at N900...

i tried another cable, another PC, and than i tried it with the 230V - Charger...
but.. nothing..

i removed the battery, waited for 5 min, tried again.. nothing..

so.. any ideas?

- M4dMike

Same problem. Mine is also not charging. I think there is a hardware problem. Something in the charging circuit in the phone is not working. Maybe the usb port (This thread is about problems with the usb connector).

what is the SN / build date of your device ?

There's a long thread here about broken USB ports.. Remember that the usb socket doesnt have to be loose and rattling round inside the device for the contacts to have broken off the motherboard..

If you've tried a different wire, different power source and removed the battery a while, I'd conclude that the connection inside the phone has a problem. You could take your wire/laptop/charger into a phone shop and ask if they will get out another phone (blackberry) that charges off this type of connector..
Or you can ask them to use their phone, their charger, and try your phone too.. which they may be more amenable to doing

I sent it back to nokia.. and got a new device..
no problem at all.

- M4dMike