You have a bootleg tablet. Another member a while back posted pictures of 2 note 8s that he had. One like you described, and a legit one. Sounds like yours may be a counterfeit or some very early batch they ran before they changed to a micro USB. I have a feeling you will have a hard time getting parts. What happens when you enter the serial number on Samsung's support site? Did you buy it from a reputable dealer?
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Phones & Tablets: Galaxy S4, Galaxy Note 8", Evo 4g LTE, Evo 3D, Acer Iconia A500, Samsung Galaxy Tab 2 10.1, Ipad 2, Nabi 2,
Rom: Rooted Stock for now, Hotspot Mod, Xposed, Wanum
Kernel: Stock for now