If your Asus RT AC68U flashing power light is flashing abnormally, then use Rescue Mode or the Firmware Restoration utility to resolve this issue.
Step 1: Download and install the firmware restoration utility on your computer
- Visit the www.asus.com web site from a browser.
- Select your router model.
- On your router’s support screen, click the Support option.
- Go to the Driver & utility tab followed by Driver & Tools. If required, select your OS type from the drop-down menu.
- Select the firmware file and click Download beside it.
- Once the utility file has been downloaded, open the zip file.
- Click the Application: Rescue file.
- Select your language from the given menu list and click Next.
- Complete the installation process by following the on-screen instructions.
- Once the installation process is completed, open ASUS Utility by clicking the Start menu followed by Program > ASUS Utility.