My Curve is just under a year old....I had it charging all night and when ... BlackBerry Curve forum
Phone shuts down after start-up
My Curve is just under a year old....I had it charging all night and when I went to unlock it this morning, It froze. I removed battery and replaced to restart. The phone powers up, gets to the main screen for me to unlock and then shuts off. I have done this about 20 times.
See if it'll power up when you have it on the charger. Do you have a spare battery? Might want to try a new battery and see if that might not be the culprit.