Having recieved a 'working' tablet from eBay, to my dismay the tablet wifi and bluetooth didnt work—but it was such a good deal I figured I'd just repair it. Having done all the usual things of reseting and reapplying firmware, I confirmed it was a hardware problem. Jumped on Google, found iFixit's site, ordered the mainboard and waited for the item.
Easy as pie, took out the old mainboard, put in the new one, and bingo! wifi and bluetooth came to life
Always ask if every aspect of the tablet is working.