repairing a TF700T?

i have a transformer infinity tablet that over a year ago stopped functioning.. in fact, i purchased it originally and it lasted less than a year before it stopped booting past the BIOS, ASUS forced me to pay 0 for repairs because it was rooted, even though it was a HARDWARE failure as they said the onboard storage chip fried.. so they replaced it after i paid them only for it to happen again.. not wanting to spend another 0 for something that would probably just fail, yet again (never buying ASUS again now) its just been sitting in a box

now i notice i can buy working motherboards for .. my question is would there be any soldering involved, any hardware locking issues or could i purchase a replacement motherboard, replace the old with it and fix my tablet?