First thing is that since the tablet is brand new, I'd suggest returning it to your place of purchase for an exchange or a cash refund. It's covered under manufacturer's warranty, so even if you bought at a big box store (Best Buy, Cosco, Walmart), you will have to send it back to the manfacturer for repair. Only if they cannot repair it will then send you another unit--and be prepared for this to NOT be a brand new device, but rather a working refurbished unit.
Even if you dropped the tablet, which is very often the cause of the table to mysteriously "stop working", as long as it doesn't have a cracked screen, huge scratches or gouges, or teethmarks on the outside case of the tablet, you'll probably get a free repair or refurb replacement. However, if you did drop it (or a friend or family member or coworker etc. dropped it unbeknownst to you), when the RMA tech inspects the tablet and opens it up, if the damage is considered to be "abuse", then by the terms of the Factory Warranty they can deny your claim to free repair. If this happens, they will contact you by phone or E-mail and let you know your repair Claim is denied, and that they can still fix it, but it's going to cost you $400 to do so. If this tablet only cost you say $200, that's probably never going to happen--you'd just chuck that old one in the trash and go out and buy a brand new one!!
From a repair tech standpoint, tablets are not money-makers. All of the ones I've attempted to repair that needed to be opened up to be inspected or their hard drives replaced for example, do not go back together; they are made very cheaply, and I mean that to be in the very worst sense of the word. That means that even if I gave you all the tests to do for hardware and you found a failure, you couldn't get it open and back together to complete the repair--unless you are the factory. I believe that you then are restricted to software troubleshooting and repairs; some of which you already tried. There are many more; but if the damage you experienced was due to a drop, no software can repair failed hardware!!
I'd go the Warranty route, and if you get nowhere, post back and we can help you with some software diagnostics. I wouldn't recommend messing with the hardware as that requires dissassembly--which is the Kiss Of Death on these devices. They are made to be disposeable, not repairable. (however, there are places that specialize in Tablet repair, and they have the right tools and training to fix these; nobody in my locale does this).
Best of luck,
Edited by BIGBEARJEDI, 13 November 2015 - 12:35 AM.