The mother board of DT-11 is B85M-G from Asus.
To prevent the connected USB devices from emitting lights even when the PC is shutdown, move the jumper KB-USBPWB from connecting pin 2-3 (+5VSB) to connecting 2-1 (+5V). This was done on 2020-12-29 around 23:00.
According to the Manual:
- Set this jumper to +5V position to wake up the computer from S1 sleep mode using the connected USB devices.
- Set this jumper to the +5VSB position to wake up from S3 and S4 sleep modes. This is the default.