Loss of Channels after Minibox Installation

How do you have the cable run from the pole to the mini box? Splitters or amps? Digital signal requires more strength then analog, so it's possible the outlet has weak signal and only seeing a problem since mini boxes. 

Single TV, one splitter for internet service. Cox should be able to scan the Minibox & determine if it's a signal strength issue (that data is available channel by channel in the technical menu ), or a firmware reset issue. I hope they monitor these forum posts.

Tnx

Beldar said:
one splitter for internet service.

Is it a normal balanced 2way splitter? If so, could you post the modem's signal levels from 192.168.100.1? All things equal, the signal to your modem should tell us what the signal to the mini box is.

Beldar said:
ox should be able to scan the Minibox & determine if it's a signal strength issue

The boxes aren't configured for upstream, so there is no way for the box to send that info to Cox. Same reason why you can't get EOD, SDV or Premiums on the mini box either. 

Beldar said:
I hope they monitor these forum posts.

They do. If you want, and don't see, a response, send a email to cox.help@cox.com with a link to this thread. 

PS. Has any technician been to your pole to check for any filters left over from the CATV days?

I believe these are the signal levels...

Beldar said:
these are the signal levels

Considering your behind two splitters, your signal levels aren't bad. What concerns me is your downstream channel 4. It seems to not be bonding that channel and reads a 0 SNR. Could be a filter somewhere blocking some frequency or noise interfering with that signal on that frequency. Any problems with your internet? Is your download speed stable?

Beldar said:
tech installed an outdoor splitter at that time but it's enclosed

I think a technician is required then to check that splitter. Technical everything after where the coaxial grounds AKA demarc is your property so if you could get access, removal would be your privilege IMO. The question is why the splitter was put there. Do you have any other cable outlets in your house that need to be active? Phone modem?

Beldar said:
minibox green LED is flashing 4 short times,

Not sure. Couldn't find anything either. Try running a Self Test as per page 37 of manual:

To run the Self-Test, begin at the Technical Support Menu. Use the RIGHT arrow to move the highlight to Self-Test. Press SELECT to run the Self-Test.

Ran selftest: failed the 1st time, said "some elements of the Guide may be missing or unavailable, ref M.5.1.10". Reset power to the minibox, ran seft test again and passed. Ran SW update check and no update found. 

Still have approx 50% of the channels either scrambled or missing. 

Regarding the splitter, there is only one, it divides the incoming cable into 2, one for the single TV outlet (actually, no outlet, it just runs thru the wall into the room), and one directly to the cable modem.

Pls elaborate on "demarc" above and what is Cox's responsibility. If they are monitoring this forum haven't heard anything from them yet. And, thanks for your suggestions and help so far.

Beldar said:
Pls elaborate on "demarc"

Demarc, or point of demarcation, is where Cox's coaxial connects to a electrical ground before entering your house for service. Would look something like below but depends on if above/underground wiring/apartment/etc. That point is where Cox's wiring ends and "your" wiring begins. Even if Cox installed it, if it's inside that loop, it's yours to do with what you want. I wonder if instead of a grounding block like shown below, the installer used a splitter with a attached ground connection point as the dmarc, splitting your signal unnessicarily. Only way to find out is for someone to check. Either way there is something wrong with the signal going to the modem and box and that is the core issue.

Beldar said:
If they are monitoring this forum haven't heard anything from them yet

Did you send the email?

Yes, the grounding block was replaced with a splitter with ground lead, in order to provide an additional line into another room for the internet service. I don't think this splits the signal unnecessarily as you say, since the cable service was needed for the new/additional cable modem in another location.

I've emailed cox.help as you suggested with a link to this discussion.

I have an RG6 cable of sufficient length and I may disconnect the router and run ~that~ input to the minibox and see if the problem is on the coaxial line dedicated for the TV. 

Beldar said:

BTW, the minibox green LED is flashing 4 short times, I don't see in the documentation if that is normal or not.

Can’t explain what 4 flashes mean (Tecknowhelp seems to have you on right path) but I can tell you it is NOT normal. My working mini-box LED stays solid green (no flashing).

Hi Beldar,

The information I have regarding the mini box LED blinking patterns are as follows:

It sounds like a service call might be needed so we can get all of your mini box channels working for you. Let us know via email when you're ready to schedule so we can get an appointment set up for you.