How to Fix ASUS RT-AC68U All LEDs Unlit

Quick Diagnosis

An ASUS RT-AC68U router with all status LEDs unlit indicates that the router is not receiving power, the physical LED toggle button on the back has been disabled, or the unit has suffered a hardware power failure.

Technical diagnostic blueprint diagram for the ASUS RT-AC68U showing symptoms of All LEDs Unlit.

Step-by-Step Resolution

  1. 1

    Locate the physical LED On/Off button on the back of the RT-AC68U router (situated near the WPS button) and press it once to verify if the lights were simply toggled off.

  2. 2

    Verify the physical Power button on the back of the router is pressed in to the 'ON' position.

  3. 3

    Unplug the power adapter from both the wall outlet and the router's DC power port, then plug them back in firmly.

  4. 4

    Try plugging the power adapter directly into a different wall outlet to verify the source outlet is functional.

  5. 5

    Examine the power cord for signs of physical wear, cuts, or hard bends.

  6. 6

    If the power LED remains unlit but the Ethernet ports blink when cables are connected, perform a cold clearance by holding the WPS button on the side while pressing the Power button to boot the unit.

Alternative Causes & Edge Cases

  • On the ASUS RT-AX88U, all LEDs can turn dark if the router enters recovery mode (Rescue Mode), which occurs after a failed firmware session and is resolved by a cold reboot.
  • On the ASUS RT-AC86U, a failing external power supply block will often show a pulsing faint blue LED instead of standard white lights, indicating insufficient voltage delivery.