Arris SB8200 connection drops

The downstream power is generally too low / weak (some are out of spec as are some of the SNR's). That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

Some stuff that you can try. If none of the below applies, then you'll need a tech out to investigate / work on that tap / pedestal.

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 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart 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 have 1 CommScope splitter that is 5-1002Mhz. The main line hits the splitter and 1 goes to the modem while the other goes to my HDHomeRun Prime.

I believe this splitter was supplied to me by Comcast when they initially connected my house back in 2014.

I checked the fittings and everything is tight and orderly. My house was built with a SCP panel so it houses all of my stuff in my closet. No other electronic shows any corrosion or other deterring effects.

I just got off the phone with Comcast and was told that getting a tech out isn't doable because of COVID. The guy wasn't from the US so I'm not sure he fully understood my issue and just sent a "reset" to my SB8200.

I had asked him to change my modem back to my old one and then submit a ticket for a tech to come out but he did neither of those since he said the reset he sent to the 8200 "should fix my issue". I really don't want to wait until 9PM for my internet to go down for the fourth night in a row. I have security systems and other things that rely on my internet, let alone the fact that I'm paying for no internet.

I know this box outside is the point of fault as it has been in the past. What do I need to say or be able to call someone in the US to help me? Thanks.

I am in exactly the same boat. My modem logs look very similar to yours, I also have the SB8200. I have literally been on chat with Xfinity since 4am this morning. They will send a signal and it makes things worse. Then I keep getting the run around about a tech coming out. I have spent 100+ bucks putting in all new cables. I have no splitters at all. I have done everything mentioned in this forum and I still cant get over 500 on a 1GB plan. I show them pics of speed tests and they still wont do anything. This is very frustrating. 

Sorry I wanted to reply sooner but I was getting 401 errors when trying to login to this forum.

I finally got a rep who switched my modem back to my original one while I purchased a new one (Netgear CM1000v2). My network was just fine while I waited for the new modem to arrive. After I called back to get the Netgear activated and since my internet has been doing just fine in terms of not dropping out every night like it did with the Arris SB8200.

I believe though my stats look roughly the same (within a partially weak signal) due to the pedestal at the end of my driveway. Comcast says that the signal is fine and they can't send out a tech unless the system generates a ticket because of COVID. I guess I will have to wait for COVID to die down some before I can get someone out to check out the line again and hopefully replace the whole splitter out there as I know it is a contingent point of my network degredation.

Here are the stats with the Netgear:

Most of the downstream power levels are still poor / out of spec. Your new modem may be a bit more tolerant of less than stellar stats than was the previous one. This still should be addressed nevertheless. Good luck !