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connecting usb modem causes bank screen

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Senior Member
Oct 22, 2010
I have a Softwiner EVB China tablet and a ZTE mf190 modem, I plug the modem with
the OTG cable and the modem light gets red but as soon as it gets green the tablet go blank, I mean the screen gets blank but u can see its not off. I get black blank, sometimes red blank or sometimes white blank. any help