I fixed my t42 motherboard by soldering a tiny wire over a blown fuse.
I was in the process of replacing the failed fan on the CPU heatsink. (Had to transplant the fan from a smaller heatsink that came from a lesser t42 with a smaller heatsink that didn't fit... Long story.) Prior to the procedure, I wanted to carefully see if there was even voltage on the FAN pins. I wasn't careful enough and thought I shorted the pins. Indeed, when I connected the working fan, it didn't work. So I figured that a fuse blew somewhere. Did some searching on the web, found a partial schematic for the board, found the 1mm x 2mm FAN_FUSE (or something) and soldered a wire on top of it. To my surprise it worked. Still using that t42 when on the go.
I was in the process of replacing the failed fan on the CPU heatsink. (Had to transplant the fan from a smaller heatsink that came from a lesser t42 with a smaller heatsink that didn't fit... Long story.) Prior to the procedure, I wanted to carefully see if there was even voltage on the FAN pins. I wasn't careful enough and thought I shorted the pins. Indeed, when I connected the working fan, it didn't work. So I figured that a fuse blew somewhere. Did some searching on the web, found a partial schematic for the board, found the 1mm x 2mm FAN_FUSE (or something) and soldered a wire on top of it. To my surprise it worked. Still using that t42 when on the go.
This t42 is my Oliver, basically.