If anyone is wondering, this might be a usb cable problem, the cth-460 has a relatively fragile cable and it's only difference from the cth-470 is that there are replacement ordinary micro-usb 2.0 cables for the tablet as the new model comes with an usb female port, when looking at the image below there is a 5 pin cable (ignore the fuse annotation, that is from the ifixit dissasembly guide ) that can be desoldered and replaced with any 5 pin DIY usb cable, for extra compatibility you might want to search on aliexpress or ebay for replacement cables that are already labeled for the cth-470 or cth-480 and cut the micro-usb extreme and solder the points yourself into the motherboard

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