For the last couple of days I have had no Internet access. I've tried resetting everything by unplugging things and hitting the reset button, but nothing works. I've noticed that the US and DS buttons on the modem are blinking, which they didn't do before.
Can anybody offer any advice on what this might mean. I am definitely NOT technology savvy so any help would be appreciated. My cable and phone are working.
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That is very bad, and means you can not connect, US is the first phase and means upstream,
and ds means downstream.
To connect the modem needs to find the downstream signals and get its clock synced to the right frequency and to locate all the channels. Then it needs to find the upstream channel and adjust its power till the other side sees it, it needs to lock the phase correctly of the signal so it can transmit in the correct time slots or so.
The US and DS lights mean the modem is trying to do that phase of calibration, so it means that the wire must not be very good, or disconnected, or bad or the modem has failed.
It is very bad.
****Validated solution current through 2/2018- Community Team****
Bottom line regardless of any technical mumbo jumbo accurate or not, this is primarily a customer to customer type of help venue here so you are not speaking directly to Comcast employees. This issue tends to be related to your modem not able to correctly connect to wifi service. Have you tried unplugging the modem from the power source, waiting 30 seconds and then plugging it back in? If worse comes to worse and you really need to, you can reset your modem back to factory defaults by taking a pin (or other small object) and inserting it into the "Reset" inset button on the back of the modem.
- OR -
**NOTE**: This Factory Reset will take all your modem settings back to whatever they were when they left the factory, including WiFi names/passwords.
You can also reset your device remotely by:
For more information on resetting your device see here: https://www.xfinity.com/support/internet/troubleshooting-your-cable-modem/
Do you also have their T.V. service ? If so, is that down as well ?
If the unplugging it doesn't work, or if your other services are down, you will need to get a Comcast technician out to your house. The employees who support the Customer Service boards can schedule a tech for you, or you can call in to 1-800-COMCAST (1-800-266-2278) or use chat support here: https://customer.xfinity.com/help-and-support/chat
If your TV is broken, maybe there is an outage or the cable is broken or something.
If you call it in, they can check if there is an outage and if it is just you.
If an outage, then they might fix it outside since it bothers other people also.
If it is just you then they need to send someone to fix whatever it is.
E.G. knows this mumbo jumbo more than me, I had a bad modem that did US, and DS and then failed at connect, the technician replaced it.
The OP wrote this
My cable and phone are working.
If the OP is renting a modem from Comcast it might be worth getting a different modem from them. If they own the modem it might be worth getting the lines checked first before buying a new modem.
commanguy wrote: Could have sworn it was there last evening. ...
Still is, isn't it? In post #1? :
... Can anybody offer any advice on what this might mean. I am definitely NOT technology savvy so any help would be appreciated. My cable and phone are working. ...
Thanks, on my review I must have missed post #1. Maybe time for new glasses or a better brand of caffine.
Is the phone hooked to the modem with the US and DS lights blinking?
How could an internet phone work without basic connectivity?
Or is it an AT&T phone, or is it connected to a different device?
This is quite odd.
I have also been having the same issue. The tech was here two days ago knowing what modem I have but still brought the same one to replace it. He then got on the phone and told me I need to upgrade my modem. They were already aware that I need the upgrade but still sent the guy with the same modem, (TM602G/CT). The best part is this morning I received a phone call the day after the tech was here, which was a recording, from Comcast TELLING me that I need to upgrade my modem but I have to do it online. Why couldn't they just send one with the tech???
Sorry for my rant but this may be your issue as well as a lot of Comcast subscribers with certain modems that are experiencing this issue.
That typically means that the signal is too weak / out of spec for the modem to be able to achieve sync with the system.
Stuff you can try;
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1000 MHz, bi-directional, and no gold colored garbage from Radio Shack, Home Depot, Target, etc. Splitters should be swapped with known to be good / new ones to test.
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
I know people have posted this in the forums before, as I have read the replies. It doesn't seem like many people followed up with how they solved the issue.
Long story short: my internet hasn’t been working today. I did the usual: power cycle, check connections, reset the router completely. I tried different coax cables, as well. Note: I only have one coax connection inside my house as I only use internet. I contacted Comcast, they sent a refresh to the modem – didn’t work, they’re sending out a tech on Friday.
I took the modem outside to where the coax enters my home through the line trenched in my yard. Nothing. Tried this twice, gave up.
Is this something that can even be fixed? I only got Comcast in April; my house is a new construction, so Comcast had to trench up my driveway and yard. What happens if it’s the actual line in the yard?
Post your upstream and downstream signal levels . Click the link or type: http://192.168.100.1 or http://10.0.0.1 into your browser. We are interested in your power levels (dBmV) and your Signal to Noise Ratio (SNR). You may also want to contact Comcast and ask for your upstream SNR (uSNR) and receive level.
Unfortunately, it is not displaying a power level, US/DS, or SNR; it is only showing the lock status.
Any suggestions as to what I might be dealing with, here, is appreciated!