viewsonic g tablet booting helpss

Good evening,
I am a little lay in the subject, and I have come for help.

I have a viewsonic g tablet, where it does not start.
I changed the Rom and it freezes this screen.

http://ift.tt/1RJadv5

So far so good, but when I went into the boot (Power, Volume +) it freezes this screen,

http://ift.tt/1SjZl93

and I'm gral with a problem, I can not use the USB Mini.

http://ift.tt/1RJafCX

What can I do ? help please.

I am looking to come back with this tablet for my son.

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