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There are only so many milliamperes available to the whole USB bus on any computer. Having too many devices connected will cause not enough power to charge your tablet.
Try a wall adapter.
Check the battery is charged - it may be duff and nee replaced if it is not charging or your power adaptor may not be charging it - check it with a multimeter - the power socket on laptops andf tablets are very susceptible to damage - if that fails then plug it into a pc using the usb port - it will charge very slowly as usb only has a very low charge current but be patient and if it charges up after 12 hours using the usb method you will know one way or another whether its the battery or the power socket or charger.
Are you sure it is the port that needs fixed, or is it your usb cord you plug into? If it is the port you need to send the tablet in for a technition to repair. First try a new charger or usb cord and see if it works.
Sounds like it is not charging.
The unit will power on momentarily if low batter but power off straight away
Get an electrical competent person to check the output of the power unit or use know good unit.
If tablet keeps burning out charges it is due to the fact that an internal short in the tablet is making the charging unit exceed its parameters and allowing it to burn itself out. The issue is with the tablet, not the chargers.
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