Hard reset TP-LINK TL-WR841ND

Factory reset (Hard reset)With the Router powered on, use a pin to press and hold the RESET button hole on the back of the device. Hold for more than 5 seconds, release and wait the router to reboot to its factory default settings. Second option – hold the button for between 8 and 10 seconds and then release.
FirmwareFirmware link
Default usernameadmin
Default passwordadmin
Default IP address192.168.0.1 or 192.168.1.1