I've noticed that Lenovo has come up with a 'solution'. It's not actually a solution to the problem, it just makes it an easy fix.
Your problem is not uncommon with PDAs, phones, laptops and anything else that required an external power source to charge.
Here's what happens:
While the device is pluged in, someone trips over the cord (or knocks the device off of a desk/table/etc) and the pull on the cord is strong enough to snap off the solder points on the motherboard. The only real fix is to remove the motherboard & resolder the connection points or replace the motherboard.
Starting with the T60's, Lenovo started making a 'floating' power recepticle that then plugs into the motherboard. When you break the power connector, you just have to open the chassis, remove the old connector, and replace it with a new one.
Simple, but brilliant.
BB devices I've owned: 957 : 7750 : 7250 : 8703e : 8830 : 9530 : 9630 : 9650 : 9930 : 64GB PB
BES 5.0.4 ~ BES 10.1