None of the channels are working on one of my boxes. The menue comes up but all channels are not available. All channels give the S0a00 error. The other box is fine. I have tried the troubleshooting steps including unplugging the power cord and waitng a few minutes and plugging back in but that doesn't help. I have let it be turned on all night but the channels never come up.
The power light and data lights are lit up. I even unplugged the cable going to that box and plugged it into the box that is working and it works fine so both cables are working and connected well. When I try the onling troubleshooting and a signal is sent to the box I get a message that says "We couldn't reach your box". The TV I am using has to use the AV 5 cord connection and it was working with that but suddenly quit and hasn't worked for several days.
It's a fairly old box. The number on the front of the box is RNG150N.
"One Moment Please, Available Shortly, Ref code S0a00" and similar messages are generated by the cable box when the signal for the channel you are trying to watch is too weak or has too much noise. Since a second box is working, this is most likely due to a poor connection in your home.
Troubleshoot by checking all connectors for corrosion and tightness, and by looking for damaged coax cable. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power.
If you can't find the problem or you'd rather have Comcast take care of it, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. Insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast cable box/DVR/digital adapter or anything outside your home, you shouldn't be charged.
For additional information please see https://forums.xfinity.com/t5/Test-TKB/Pixelation-video-and-audio-dropouts-One-Moment-Please-S0a00/m....