Our BMPro tablet gave us fits like this as well. We had to take it off the wall and remove it from the frame. If I recall, you can hold down the Power + Volume Down buttons on the tablet to boot into safe mode (You get an Android boot up menu with recover options, basically). Ultimately our tablet was just toast so we replaced it with a 7" Onn tablet from Walmart, installed the BMPro app, and it works just fine. Hope you were able to get yours working again.
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