SOURCE: Broken touchpad connector
I suggest you replace the motherboard. A recent search on ebay turned up three ranging in price from $18 to $85. Soldering a motherboard by hand has a very high failure rate. It's easy to bridge or scratch something and fry the board. You could of course try to do it and if it fails get a replacement board.
SOURCE: no light when charger connected to laptop.
Here below is an DC Power Jack repair guide. But it's only for people experienced with soldering and repairing computers. If you don't feel comfortable doing this job, please do not open the laptop or you can permanently damage your computer. Take your laptop to a professional repair shop instead.
http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/
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