A issue with your internet connection or router hardware is indicated by the red light on your TP-Link router. A red light on the TP-Link router typically indicates a configuration problem or that the device is not getting a consistent internet signal from your modem. Restarting your modem and router, checking cable connections, or resetting the router settings can all help resolve the red light on your TP-Link router. If the red signal doesn't go away, try changing the firmware on your router o... moreA issue with your internet connection or router hardware is indicated by the red light on your TP-Link router. A red light on the TP-Link router typically indicates a configuration problem or that the device is not getting a consistent internet signal from your modem. Restarting your modem and router, checking cable connections, or resetting the router settings can all help resolve the red light on your TP-Link router. If the red signal doesn't go away, try changing the firmware on your router or getting help from your internet service provider.https://tplnklogin.com/tp-link-router-red-light/