Papoo

I own a Samsung SGH-191 CDMA mobile handset. This set has developed a peculiar problem. It simply doesn't switches on! Whenever I press the power button, the phone vibrates and switches off automatically. I have tried replacing the battery with a new one but the problem persists. Can this problem be fixed? If yes, then how much it would cost to me? Anybody here, who knows about repairing CDMA handsets please advice. I am waiting for a quick reply.