I've had power-related problems with my M1330 as well. Once this one kaputs, I'm going Thinkpad.
Anyways, is your bios updated to the latest version? I'm thinking that if you've already reinstalled your OS, then the issue may be with your bios. Also, if that doesn't work, you might want to look into getting a 3rd-party program that can override power/motherboard settings manually (CPU clock, voltage, etc.)
I forgot the name of the one I used, but I do know that these programs exist.