There might be several reasons the device is not charging. The charger or the USB might be defective. In order to fix the problem, plug the charger into a different adapter. If this does not solve the issue, check to see if the USB port is damaged. Replace the USB port if it is broken. For more information, please refer to the [[Acer Iconia Tab 8 A1-840 Troubleshooting#Section_Defective_Charger|troubleshooting]] page.