i just bought my n97 yesterday and i'm having problems with it already. there's this side switch that lets you turn the screen on and off and it was working fine yesterday but now it wouldn't turn on. i try resetting it by hitting the power button and that doesn't work as well. it wouldn't even light up! so i remove the battery and put it back on and when i turn off the screen, it wouldn't turn back on again! can anyone please help?