The yellow blinking light of the Apple router indicates that you need to update the firmware or a base station has been reset. Let’s have a look on how to fix Apple router blinking yellow.
Steps to make the yellow light stable:
Update the firmware of your router.
Remove the power adapter and plug it in the socket.
Press and hold the reset button for 10 seconds.
Now, configure the settings.
Save the changes and see if it has stopped blinking.
Read more: apple airport utility