I see that this is a little old, but I thought I'd still add that the 1525 can be just opened up and replaced. I just did it to mine. I put in a T5800 and it worked fine. Just opened the bottom and unscrewed the 5 screws to the heatsink for video and cpu, unscrewed the cpu socket, put new one in, and screwed it back in. Of course, be sure to put new thermal paste and clean old stuff out first. Video has this certain stuff already there, so just put it back the same.