05-30-2007, 05:24 PM
first off, just to inform you a motherboard in apple world is refered to as a logic board
major pitfalls: PRICE! just a link for example: http://www.welovemacs.com/6612950.html
you are going to be spending between 700-1000 for a new logic board
step by step instructions are going to basically be: unplug computer, makeing sure to have and use an anti-static wrist strap to prevent further harm to your computer, remove all the parts. unscrew logic board, replace and put back together, it should not be difficult at all
a note to consider, make sure you are 200% positive you have the correct logic board when ordering.
my own personal recomendation would be to upgrade to a new intel mac, either imac or mac pro because of the price it will cost to repair. yes it will cost you some extra money but you can also go ahead and part out your old computer either here or on ebay. you can sell your optical drive, HD, RAM, fans, case etc and get a whole bunch of money....or just sell the entire thing as one for a litttle less than you would get for parts