I have a rev B TiBook that uses the white square power adapter (the one that replaced the clear plastic puck adapter). The DC connector (on the end that attaches to the TiBook) seems to be getting flaky. Whenever I wiggle it (either the silver connector or the gray cable near the connector), or move the 'Book, the green LED light inside of it will flicker on and off, indicating a poor and intermittent electrical connection to the TiBook. Whenever the light is not on, the TiBook switches over to battery power. Sometimes I will have the TiBook in my lap and make a very slight movement and the power adapter will lose connection, draining the battery down to 90% without me noticing. The adapter's warranty is expired. Is there anything I can do to fix it myself? If not, does anyone know of the cheapest place to buy these things? Can I buy one used? Also, is the puck adapter compatible with rev B TiBooks? It seems to be cheaper.