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Event Log with Continual - Started Unicast Maintenance Ranging - No Response received - T3 time-out

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Event Log with Continual - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Hey All - I came home tonight to some unresponsive internet (<10mb down and 0.03 up) and when I checked on the event log, it had the dreaded "Started Unicast Maintenance Ranging - No Response received - T3 time-out" message occuring over & over.  After repeated power cycles, signal resends, etc., it would clear up for 10-15 minutes then back at little to no performance.  Four hours later of troubleshooting, I couldn't make any headway with phone tech support as I own the modem (that was the initial response of its the modem's fault).

 

In years past when this has occured, the only way I've gotten this straightened out after many calls & tech support visits was eventually getting new line drops.  Was wondering if there was any ideas on what how I can help point tech support in the right direction or talk to the team at Comcast to get this properly diagnosed as the base tech support can't see anything on their end.

 

After doing more reading tonight around the upstream & downstream levels, it looks like downstream power is a bit high across the board, but all else is in acceptable tolerances.  Any ideas on what I could do to try & get this straightened out (again) or anything that can be done on my own?

 

Downstream:

  Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
1 Locked QAM256 17 621.0 9.3 40.4 0 0
2 Locked QAM256 18 627.0 9.5 40.3 0 0
3 Locked QAM256 19 633.0 9.8 40.4 0 0
4 Locked QAM256 20 639.0 9.7 40.3 0 0
5 Locked QAM256 21 645.0 9.6 40.4 0 0
6 Locked QAM256 22 651.0 9.5 40.2 0 0
7 Locked QAM256 23 657.0 9.6 40.2 1 0
8 Locked QAM256 24 663.0 9.6 40.2 1 0
9 Locked QAM256 25 669.0 9.8 40.2 0 0
10 Locked QAM256 26 675.0 10.1 39.8 0 0
11 Locked QAM256 27 681.0 10.4 40.2 0 0
12 Locked QAM256 28 687.0 10.0 40.2 0 0
13 Locked QAM256 29 693.0 10.0 40.1 1 0
14 Locked QAM256 30 699.0 9.9 40.1 1 0
15 Locked QAM256 31 705.0 9.8 40.0 0 0
16 Locked QAM256 32 711.0 9.4 39.9 0 0
Total             4 0

 

Upstream:

   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
1 Locked ATDMA 4 5120 16.6 44.0
2 Locked ATDMA 1 5120 35.8 45.8
3 Locked ATDMA 2 5120 29.4 45.5
4 Locked ATDMA 3 5120 23.0 45.3