the power swich may be damaged... that happens. So you should open the phone's cover and try to see if the switch is ok.
Timo, October 2006
the phone is probabily water damaged
nokia 6230i dont switch on, August 2006
sometimes the pins that the battery ataches to push back in try to pull out any pin that looks like it is shorter than the rest useing a biro or something hooked ok.