Updating firmware on router
If it’s out of date, you’ll see a flashing yellow exclamation point in the top-right.Click the firmware version to go to the firmware update screen, or go to Advanced Settings then Administration then Firmware Upgrade.Sometimes, it’s just a case of the settings being wiped out and you just need to reset it, leave it unplugged for about 15 minutes, and then connect via an Ethernet cable and set it up again.Other times, it’s seriously toast, and you need to use the firmware recovery utility or try to downgrade it.
Many routers have the automatic firmware update function within the web interface.
Updating the firmware (a process often called "flashing the firmware") can help a router work better and sometimes even repair an annoying bug or add support for faster internet speed.
This is especially when a router reset doesn't help.
Some routers require you to use a desktop or mobile app to perform the update; however, most will use a web-based interface and the procedure will go something like this: Note that the update process needs to run without interruption.
If you unplug/turn off the router during this time, that can render the device unusable.