Brother HL 5370DW - B/W Laser Printer Quick Setup Manual page 53

Other Information
LED indications when using the one-push wireless setting mode
Printer LED Setting
1
WLAN
Back Cover
Toner
Yellow
Drum
Paper
Status
1
The LED will blink (turn on for 0.2 seconds and off for 0.1 second).
2
The LED will turn on for 5 minutes.
3
The LED will blink (turn on for 0.1 second and off for 0.1 second) for 30 seconds.
4
The LED will flash 10 times and then turn OFF for half a second. This pattern will repeat 20 times.
Connecting
2
Connected
SES/WPS/
1
AOSS
Yellow
Yellow
Green
Connection No access
3 3
fail point
Yellow
Red Red
4
Connection error
Red
53