I also pulled the power connector from the board and had to send the board to a repair shop to have the connector soldered back on. Working on tiny surface mount components is not for the faint of heart. Sierra Circuit Repair of Chico CA did a good job but it cost me $100.
I found T9's rather than T8's.
There is a metal bracket going between the main heat sink body and portion around the fan. Do not forget to put this back on re-assembly!
Quote from RichBern:
My heat sync looks different and had fewer screws than this.
You may want to confirm your iBook is an A1133 model.