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[AL] a week after tech left, intermittent signal problem has returned

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Last week the tech was out, and replaced some stuff in the box outside. Most of the week has gone OK, but today I have the same trouble that I originally called about. The modem lights freeze, then drop to 1, 2, 3, 4, and even while I was working on my list of what QAM channels are what, they'd drop out. The RCA modem reports Forward Path SNR: usually 36 dB Recieved Signal Strength: usually 0.0 dBmV Modulation: 256 QAM Return Path Power Level: usually 42 dBmV Modulation: 16 QAM I'm sure if I call again, I'll be told that everything is OK. But the signal comes and goes. The Event Log has: Sun May 17 19:33:20 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:33:20 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:32:29 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:28:41 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:28:40 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:26:50 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:24:38 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:24:37 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:24:15 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:19:44 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:19:44 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:18:25 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:12:28 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:12:28 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:12:20 2015 Critical (3) No Ranging Response received - T3 time-out Sun May 17 19:12:05 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:10:36 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:10:35 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:07:52 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:00:04 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 19:00:04 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 19:19:04 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC f... Sun May 17 18:58:44 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 18:57:12 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 18:57:11 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 18:56:55 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 18:55:42 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 18:55:42 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Sun May 17 18:54:50 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sun May 17 19:33:07 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/Q... Sun May 17 18:46:40 2015 Notice (6) TLV-11 - unrecognized OID Sun May 17 18:46:40 2015 Critical (3) DHCP WARNING - Non-critical field invalid in response. Is there a way to find out what the actual problem is?

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