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Short answers for common light states and brand-specific router or modem warnings.
Online off means the modem is not registered on the provider network. Wi-Fi or Ethernet lights do not fix that by themselves.
Hitron gateways usually show Power, DS, US, Online, Wi-Fi, and LAN. DS/US tells you whether cable signal is locked.
DS or US blinking on Hitron usually means the cable signal has not fully locked.
A red or offline Hitron status usually means the gateway cannot complete service registration or has a signal problem.
LAN lights blink during data transfer. That can happen even when the internet is healthy.
A blue USB light usually means a connected storage or USB device is detected or transferring data.
The 2.4 GHz band may be active while 5 GHz is disabled, out of range, or named separately. This does not always mean internet is down.
A healthy 5 GHz light does not guarantee speed. Distance, walls, interference, or backhaul service can still slow devices down.
After an outage, the modem may need to register again and the router may wait for WAN service. Light colors can cycle during recovery.
Lights show link state, not speed quality. A normal light can still hide congestion, weak Wi-Fi, bad cable, or provider slowdown.
Tell support the device model, exact label, color, blink pattern, and whether it changed after a modem restart.
Power should stay on. Online or Internet should be steady for service. Wi-Fi may blink during traffic. Ethernet lights depend on connected cables.
Power and Online should usually be steady. Downstream and upstream may blink during startup but should settle on most cable modems.
A color chart helps separate normal activity from warning states, but it only works when paired with the printed LED label.
A modem color chart helps spot startup, signal lock, online state, and cable problems without changing Wi-Fi settings first.