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You can't. I've never seen schematics offered by any manufacturer for their laptops (or desktops, for that matter), even to warranty service centers. The boards were never intended to be serviced to component level, just replaced as a single part.
When I worked at a shop full-time servicing laptops we had some success at repairing boards with power problems where it was possible to trace out the circuits and identify bad parts. But most of the time all we could do was change the board.
Did you reinstall all drivers from the recovery CD? Windows should have detected the wireless card and installed the software for it and notify you automatically of nearby networks without any further software being installed.
Remove the battery and the power supply. Hook it to wall power only w/o the battery and try to turn it on. If it boots great, otherwise pull the power from the unit while it tries to turn on. Plug it back in and try turning it on again. If that doesn't work you need to re-seat the RAM and/or processor. Last thing to try if that doesn't work is new RAM as a processor almost NEVER goes bad and it is either the RAM or the motherboard at that point.