Android jellybean usb computer connection not allowed
I have just bought a new lenovo A3500 (A7-50) tablet with 4.2.2 jellybean system .my computer is running on widows 8. when i connect my tablet via usb cable the compuetr don't sense the device and i can't find it on the device manager even as (other devices). I tried allowing usb debugging in (developer options) but nothing changed.So i tried to change the way the tablet connects to the computer by going to Settings > Storgae >(menu)> USB computer connection but i found it not allowed as in the following image. http://mousomashakel.webuda.com/a3500usb.jpg
I have Windows 8 and a Lenovo A3500-FL (A7-40) where I can reproduce your screenshot by unplugging the USB cable. Are you sure your USB cable is working? I have a few cables that only work sporadically after a year of usage.
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