Hi folks I have a problem with a brand new sero 8.after its original charge ran low it wont show that it is charging. ive used multiple chargers we have 2 more sero 8's and a sero pro 7. and none of them will show up as charging.. no battery animation wheter it be wall charger or usb via PC. Tablet functions fine as long as its plugged in and shows the lightenening bolt in battery just no animation and it never takes a charge. anyone have any Ideas? Ive done 2 factory resets to no avail.