Hisense Sero 7 Pro: computer doesn't detect it topic

I just got a refurbished Hisense Sero 7 Pro from Newegg. It works fine except when I try to plug it into my computer via USB nothing happens. It doesn't detect it, try to install drivers, nothing. I have gone into the settings and turned on USB Debugging via the developer options. I also tried several diffent cables to no avail My computer does detect my Galaxy Nexus phone with no problem. Can anyone help or am I boned and need to send it back?

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