The lights on your Arris SURFboard modem tell you, at a glance, whether it is online, how fast it is connected, and where a problem might be. This guide explains what every light means on the four most common Arris models: the SB6190, SB8200, S33, and G36, in plain language.
Key Takeaways
- Solid green or solid blue means you are good. Blue is the faster connection (DOCSIS 3.1 on the SB8200, S33, and G36, or bonded channels on the older SB6190). Green is a normal, working connection.
- The SB6190 and SB8200 have a row of four lights (Power, Receive, Send, Online). The S33 and G36 have one single light that changes color.
- Blinking is normal for the first few minutes after you plug in. A light that keeps blinking for more than about 10 minutes usually means a signal or activation problem.
Affiliate Disclosure: ModemGuides.com is a participant in several affiliate programs. We may earn a commission when you buy through links on our site at no additional cost to you.
Arris Modem Light Colors at a Glance
Across Arris SURFboard modems, the colors mean roughly the same thing no matter which model you own:
- Solid green: connected and working in standard DOCSIS 3.0 mode.
- Solid blue: connected at higher speed. This means DOCSIS 3.1 on the SB8200, S33, and G36, or bonded channels on the SB6190.
- Blinking green: the modem is starting up and searching for a signal. This is normal at first.
- Amber (solid or blinking): on the G36, solid amber simply means power is on. Blinking amber on any model means a firmware update is downloading. Do not unplug it.
- No light, or a steady unusual color: usually a power, signal, or hardware problem.
Two Light Layouts to Know
Before reading your lights, check which layout you have. The SB6190 and SB8200 show a vertical row of four separate lights, each labeled. The S33 and G36 use a single light that changes color and blinking pattern to tell you the same information. So on a single-light model, one color is doing all the work.
What Each Arris Model's Lights Mean
Arris SB6190 Lights (Four Lights)
The SB6190 is a DOCSIS 3.0 modem with four labeled lights:
- Power: solid green means the modem is on.
- Receive (downstream): blinks while searching, then solid green for a single channel or solid blue for multiple bonded channels.
- Send (upstream): blinks while searching, then solid green or solid blue, same as Receive.
- Online: blinks while connecting, then solid green once you are online.
Because the SB6190 is DOCSIS 3.0, its blue lights mean several DOCSIS 3.0 channels are bonded together, not DOCSIS 3.1. On white SB6190 units, the Power and Online lights can look dim or white when Receive and Send are blue. That is normal and does not mean anything is wrong.
Arris SB8200 Lights (Four Lights)
The SB8200 is a DOCSIS 3.1 modem and uses the same four lights:
- Power: solid green means power is connected.
- Receive (downstream): solid green for a standard channel, or solid blue for a DOCSIS 3.1 bonded connection.
- Send (upstream): solid green or solid blue, same as Receive.
- Online: blinks while connecting, then solid green when connected.
When all four lights are solid green or blue, you are fully online. If the Receive and Send lights blink together for several minutes, the modem is updating its firmware. Wait 10 to 15 minutes and do not unplug it.
Arris S33 Lights (One Light)
The S33 is a DOCSIS 3.1 modem with a single light:
- Off: no power. Check the power and cable connections.
- Blinking green: searching for a signal, not yet connected.
- Solid green: online in DOCSIS 3.0 mode.
- Solid blue: online in DOCSIS 3.1 mode, the fastest connection.
- Blinking amber: a firmware update is downloading. Do not unplug it.
- Alternating blue and green flashing: error mode. Check your cables and restart the modem.
Arris G36 Lights (One Light)
The G36 is a DOCSIS 3.1 modem and Wi-Fi router combo, also with a single light:
- Solid amber: power is connected and the modem is starting.
- Blinking green: the modem is finding its connection.
- Solid green: online in DOCSIS 3.0 mode.
- Solid blue: online in DOCSIS 3.1 mode, the fastest connection.
- Blinking amber: a firmware update is downloading. Do not unplug it.
| Model | Light Layout | Healthy Status | DOCSIS |
|---|---|---|---|
| SB6190 | Four lights in a row | All four solid green or blue | 3.0 |
| SB8200 | Four lights in a row | All four solid green or blue | 3.1 |
| S33 | One single light | Solid green or solid blue | 3.1 |
| G36 | One single light | Solid green or solid blue | 3.1 |
Quick Fixes When the Lights Are Wrong
The Online light keeps blinking and you have no internet
This almost always means the modem found the cable signal but has not been activated on your account yet. Activate it with your provider, then restart the modem. Most providers let you do this online, such as Xfinity, Spectrum, and Cox. You will need the modem's MAC address from the label on the bottom.
A light is stuck blinking green and never goes solid
The modem cannot find a stable signal. Make sure the coaxial cable is hand-tight at both ends, remove any splitters between the wall and the modem, and check your provider's app for an outage in your area.
The light is blinking amber or yellow
A firmware update is in progress. This can take 10 to 15 minutes. Do not unplug the modem during an update, as interrupting it can permanently damage the device.
No lights at all
Check that the power adapter is firmly plugged into both the modem and a working wall outlet that is not controlled by a light switch. Try a different outlet before assuming the modem has failed.
When to Replace Your Arris Modem
If you have checked your cables, activated the modem, and done a factory reset, but the lights still will not go solid, the modem's internal hardware may have failed. You do not have to pay full retail to replace it. ModemGuides stocks professionally refurbished Arris models, including the SB8200 and S33, compatible with Xfinity, Spectrum, Cox, and more.
Frequently Asked Questions
What do the lights on my Arris SURFboard modem mean?
Solid green means the modem is online in standard mode, solid blue means it is connected at higher speed, blinking means it is starting up or searching for a signal, and amber means power is on or a firmware update is downloading. When all lights are solid green or blue, your modem is working normally.
Is green or blue better on an Arris modem?
Blue is the faster connection. On the SB8200, S33, and G36, blue means a DOCSIS 3.1 connection, which is the best status. Green is still a fully working connection in DOCSIS 3.0 mode. If your light is blue, do not troubleshoot it.
Why is my Arris modem's Online light blinking with no internet?
The modem has a signal but is not activated on your account. Contact your internet provider or use their activation page to register the modem's MAC address, then restart it. The Online light should go solid green within a few minutes.
Why does my Arris S33 or G36 have only one light?
The S33 and G36 use a single multicolor light instead of a row of four. That one light changes color and blinking pattern to show power, connection, and speed status, so green, blue, amber, and blinking each carry the same meaning the four separate lights would on older models.
What does a blinking amber or yellow light mean on an Arris modem?
It means the modem is downloading a firmware update. This is normal and can take 10 to 15 minutes. Do not unplug the modem, because interrupting a firmware update can permanently damage it.
How long should the lights blink when I first plug in my Arris modem?
A few minutes is normal during startup. If a light keeps blinking for more than about 10 minutes, you likely have a loose coaxial cable, a signal problem, or a modem that still needs to be activated.
Why are the Power and Online lights white on my Arris SB6190?
On white SB6190 units, the green Power and Online lights can look white or dim when the Receive and Send lights are lit blue. This is a known visual quirk and does not affect performance.
