What does the M6's LED light mean?

Red

• Blinking slowly: operation in progress (e.g. booting up, upgrading firmware)
• Blinking quickly: undergoing factory reset

Blue

• Blinking: router is in pairing mode

Orange

• No internet connection 

White

• Steadily illuminated: stable network connection 
• Blinking: network connection available, however, mesh connection could be better