Antwoord op "MacBook Pro 15" A1260 Logic Board Upgrade...?"I just had a similar issue with my wife's MBP. I would not attempt to graft a different type logic board into the machine. Instead, I had great results taking out the logic board following the instructions on the iFixit site. I then searched the web for "a1260 logic board bake". You can use other terms, but the idea is to gather up some input from other users on how to prep your logic board for putting into an oven and baking it for a few minutes to anneal the solder joints and re-enable the nvidia chip and others. I was amazed at the number of folks who have apparently been able to fix their MBPs with this technique. A few things to consider: (1) The logic board removal and replacement is the hardest thing to do with these MBPs and you will need a few hours to get it all done. (2) You need to make sure you have adequate tools and small parts bins ahead of time. I have a magnetic small parts dish, among other things. Apple never met a screw they didn't like. For that matter, they must have a department...