Hi seng83,

If your router already flashed with the latest firmware 3.0.0.4.374.239, try do a factory reset on the RT-N56U.

And redo the setting see it helps or not.

Thank you

Hi seng83,

At the back of the router near the USB, there is a button. That will be the reset/restore button.

Press the button for 5 sec or more, the Power LED light will blink, once blinked, release the button and it will start restoring the router.

Remember to back up your setting because after factory reset, you will need to redo all the setting again.

Thank you

Hi seng83,

You log in to the router, then when to Administrator->Restore/Save/Upload Setting->Then Click Save.

Thank you

Hi seng83,

Just by restarting the router it become like this or after factory reset or after firmware update?

Thank you

Hi seng83,

Try power off and on again if it is still same, then it might be something wrong with the router already.

Thank you