Help! Ainol Spark 9 USB port and wifi don't work

Hi Guys,

About 3 months ago I got my Ainol Spark 9 and I update sw to 4.2.2 without problems, until now. Sudenly wifi doesn't start, "activating wifi..." appears but nothing happens, turn off by itself. MAC direction appears as "undefinied" then, when I connect to USB flash memory to usb port it is not recognize, same with the modem 3G USB dongle.

I tried to flash again but the tablet doesn't start in flash mode.

Any idea?

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