Modems

Lost power this weekend (it was connected to an APC UPS) and after reboot the SB8200 steady blinks (all 4 LEDs and the Ethernet ports).  There doesn't seem to be any decernabIe pattern.  I also can't get DHCP directly connected to a computer or communicate with a static IP.  Did the 10 sec hold several times on the reset button to do a factory reset.  Behavior continues and is persistent regardless of what's attached to the modem.  Device is still under warranty per this site.

My iMac, Aura frame and Roku stream bar all show as connected to Surfboard, but our iPhones do not. Why?

Why does it say my network is not connected to the internet? 

no connection to Samsung TV after power outage .. contacted Xfinity and they say the signal is strong so must be an issue with the router/modemArris Surfboard AX300

I had an xfinity tech out today to confirm my modem died. It simply doesn't work, although it showcases it’s fine via the light on front. How does one go about getting it repaired?Thanks in advance. Lance

What is the phone number to Arris? The number on their website and will not connect….

If its not, which model is? Please

SB8200 I did a factory reset because i couldn’t find my notes on the password i had created and the passwords online were not working. I disconnected the coax before the factory reset.  Tried logging in….browser says it can’t reach it even though i am connected to it via CAT 7. I am getting this error:   PR_CONNECT_RESET_ERROR I have tried both Edge and Firefox.I connected the coax and get online but still cannot get to the login page of the modem.  I want to confirm the mHz that it is operating at to make sure it is in the acceptable range for Comcast.

I suspect my SB8200 purchased in 2024 is starting to fail, but I cannot contact customer support due to the website saying my serial number cannot be found. I have tried entering it multiple times in different formats with no luck.

I have a new modem within that last 6 months and the power cable is now bad. I have a multimeter and am not getting 12 VDC

Internet was working great, had a brief power outage and disconnected SB6141 surfboard modem. I’ve tried unplugging the power and Ethernet and replugging and the only lights are the send and receive (both blue) and the link light is flashing blue. When it starts up the power light starts green but goes blank. Please help!

Model: SB8200All of a sudden stopped working. Checked lights, all of them were lit. Unplugged for 10 seconds. Now it shows power button solid green, transmit light blinking, receiving light and internet globe no lights just blank. Tried holding the tiny white reset button in the back until all lights in the front flashed.tried without any wifi extenders plugged into ethernet, still no luck. I’ve had this modem for quite a while at least 3-4 years.

I have a 5G wifi network and just bought a security camera that does not work on 5G.  It needs to connect to 2.4GHZ.  The back of the box shows that it has “Antenna Configuration MIMO (multiple In, Multiple  Out) for 2x2 on 2.4Ghz and 2x2 on 5.0 GHz,  How do I connect by security camera to th3 2.4GHZ without disrupting the 5.0 GHz for my regular Wifi use.

My Arris Surfboard S33v3 cable modem started flashing the green light and I am unable to get the WiFi connection now. Checked the IPv4 Address and it starts with 192 … as expected. Checked connections and they appear OK. Installed 3/7/25. Suggestions?

I purchased my SB6121 from an authorized retailer (Staples).  Recently while talking to my internet provider (Comcast), they claimed that it needed a firmware upgrade and asked me if I would allow them to do it.  They did not tell me at the time that they would be stealing control of my personally owned hardware from me.  After installing the firmware upgrade, they proceeded to tell me that there is a problem with the hardware and tried to sell me their modem.  When I log into my modem (at IP 192.168.100.1), there is no longer a “Reset All Defaults” button.  This is unacceptable and I want control of my hardware back.Is there a way I (or you) can roll back the hacked firmware they installed and return control of my hardware to me? 

How do I find the correct network name and password 

I have xfinity and they stated there's nothing they can do on there end. Lights as follows and are all solidWhite - powerRecieve - greenSend - greenOnline - white It's a refurbished model, so im not sure if the mac address is linked to another account or if its defective. Didn't try connecting a laptop because online light isn't showing internet coming through. Any assistance would be greatly appreciated.

I have an S33 that started failing and is barely a year old. It’s ridiculously hot, especially the coaxial and eventually shuts down. Right before it started turning off it would just cut the internet in and out. I have tried contact support multiple times and the one time I was able to get someone in the chat they told me I would be contacted via email or call. Never got the call. Never got the email. And since it is now the weekend they have no support. I want a refund for this modem. Can any moderators help me get into touch with someone to further this process? I’m really disappointed with this seeing as I used to really like the Arris products. 

I had an older model SB 8200 , and it worked perfectly for a year, then started to constantly reboot at random. I purchased a brand new SB 8200 v3 , installed it, it works great, except that it randomly reboots too! It just resets, which drops the internet, and then boots back up and the internet comes again. This is problematic for someone working from home who loses link at random, even though it reboots pretty quickly. Why does my SB 8200 just re-set for no reason. It is brand new! 

Got a new modem. I can not get docsis3.1. isp did lots of checks and said I'm not receiving all the channels. Tried reset many times, tried factory reset. Contacting Arris is IMPOSSIABLE since they can't validate my serial number on my NEW modem. Should I take it back and try another brand? If yes, who makes a good cable modem...thanks.

I purchased the modem from Best Buy because my modem was acting strangely. I did not get a chance to install the modem until after the bus by return policy expired. Best Buy recommended me reaching out to you about getting a refund because they were unable to refund or replace the modem. Please contact me at (Edited personal information). If you need to discuss this or please reply to this request and I will follow the steps that you provide. Best Buy told me that you would reimburse or replace the modem due to their return policy. The modem is an SB 8200 and was purchased on January 4, 2025 or $169 plus tax from Best Buy and wyomissing PA store number 580

My Arris Sb8200 cable modem doesn’t provide internet to my WiFi modem even after setting it up and activating my router with spectrum. i have bought brand new Ethernet cords and they work fine but for some reason when I connect my sb8200 to my wifi router, the internet globe light turns red on the wifi router when I connect it to my cable modem but when I connect my pc to the cable modem, I can get on the internet with my pc. To top it all off, my sb8200 keeps refusing to connect to the admin page for the cable modem!   please help!

I have just switched Internet, TV and Phone to Infinity from Verizon (also wireless but that it not relevant here). The Xfinity service team installed its proprietary modem-router into which they plugged my telephone cord into the back of the modem-router.  The phone works fine as do the modem and router.I would like to buy a modem-router rather than rent the one that I have received dfrom Xfinity.  But I want to be certain to buy the right modem-router -- one into which my voice telephone can also be plugged so that it also works. I would be most grateful for recommendations of the right model modem-router with voice phone plug for my application. If you need more information to respond, please let me know what I have left out. Many thanks. Peter

I am using the default 2.4G SSID and password.  How do I change them to my desired WiFi name and password?

Got a brand new S34 from Amazon (sold by Amazon, not some third-party seller), which has now died just over a month after plugging it in, but the website shows “We were unable to locate your serial number. Please check your model number and serial number and try again. This information can be found on the label in back or on the bottom of your device.”, despite copy+pasting the serial from Cox.com/the modem’s admin page.