The Asus Mesh Router Blinking Blue issue happens when you accidentally press the WPS button, technical glitches, power supply issues, etc. However, to fix this issue, stabilize your network, confirm the power supply, and power cycle, check the WPS button, regularly update the router’s firewall, etc. For more details, come to us!
https://asuswireless.com/asus-router-blinking-blue/