Sorry my mistake, white colour on power, red on internet.
All output power are high.
I woke up in the morning trying to get my phone connected to the wifi, then I noticed the problem.
According to the phone wifi setting, i can see the wifi SSID (both 2.4Gz and 2 5GHz) But i noticed the SSID is on and off. Then I used a LAN connection to access the router home page and it could not be reach. I went to the router to check, I saw only power and internet LED light only.
Both wireless and wire connections are inaccessible. After a power cycle, it seems ok now.
I will monitor it for a few weeks. By the way, the QoS cannot be changed.