The modem is receiving power. If this is not the behavior that the tm822 is displaying please refer to this table for more information regarding led behavior.
Residential Electric Panel Arris Modem Online Light Blinking
Arris tm822 online light blinking orange. The downstream channel is connected with bonded. Modem light status problem. The modem is not connected to the internet. All other lights are green except for a blinking orange link light. Arris modem online light blinking orange shelly lighting june 25 2018 general faqs sb8200 led light status general faqs svg2482ac led light status general faqs sb6141 front and back panel. The link light flashes when the cable modem is transferring data.
During normal operation the power ds us and online lights are on. Internet online light orange and blinking on arris tm722g only thing i could find is that its receiving setup information but just wanted to verify here. Unplug the cable modem from the ac wall outlet and wait one minute. Answer the tm822 front panel led indicators provide the following status information for power communications and errors. The downstream channel is connected. With the proper setup the online led should be on and the link led should either be green or yellow.
Verify all cable connections and try resetting the modem.