sry forgot the power it back on part 
just wanted you to make a full power cycle and not just a reboot
well I'm pretty sure your usb is broken
the last thing I can think of is that you could look into the ports an make sure that none of the pins are bent for some reason and touching another one and shorting the port out.
Sry 
bummer ! no worries ill organise a replacement , thanks for all the help regardless 
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You're welcome 
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