imho, Nix on the DIY. Soldering a board like these is 'tricky' to say the least .. specialized benches built for precision are sometimes required.
at times they simply replace the motherboard ... as to 'local' computer shops ... well, best of luck there and that's the end of the warranty.
(just food for thought before action friend)
You find yourself between the proverbial 'rock and a hard place' in this. I'm not sure how geek squad got involved instead of arranging the repair directly with asus unless you have some 'warranty' arrangement with BestBuy (@ $200 it doesn't sound as though you do).
Are you sure your not being charged by the 'geeks' for their service and asus for actually performing the service ? (wondering out loud)
also imho, I would give this a little more thought before I rushed to a 'local' or attempted it myself.
Good Luck. .c.