BB Curve :: Phone Won't Respond To Anything

I've had a problem that's been developing with my curve for a month or so, whereby it will stop responding to any button I push for no reason at all. No reaction from the power button, the scroller, the keyboard or even from putting it on to charge (when it doesn;t recognise that its being charged up). I've previously been able to fix this by taking the battery out, putting ti back in and letting it reboot itself. However, the number of times I've been haivng to do this has increased until as of a few days ago the batttery trick won't work either. My phone is now completely dead. I'll try to give as much info as is asked for in that sticky thread, but as I say, my phone is dead so I'm not able to check very much of it.