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download light keep blinking, no internet cax80
including log Time Priority Description Sat Feb 25 07:08:05 2023 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;...
Much as the logs can be useful, it helps to have a description of what is going on. Your subject is thin on details.
Which is the "download light". I can't recall any LEDs with that label.
Do you mean the Upstream/Downstream LEDs?
Many of the LEDs – Internet, WiFi, LAN – blink when there is traffic.
The CAX80 is a cable modem/router. What dies your ISP say? Those logs look like a connection problem.
There are some serious experts on cable modems around here. While many questions about routers are generic and could be answered anywhere, some things need specialist knowledge.
You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware. That's probably here:
Cable Modems & Routers
You might like to search there for messages related to your problem.
I will ask the Netgear moderator to move your message.
In the meantime you could visit the support pages:
Support | NETGEAR
Feed in your model number and check the documentation for your hardware. Look at the label on the device for the model number.
Check for various troubleshooting tips.
You may have done this already. I can't tell from your message.
I mention it because Netgear stopped supplying printed manuals and CD versions some years ago and people sometimes miss the downloads.
I meant Downstream LEDs keep blinking
TimePriorityDescriptionSat Feb 25 07:08:05 2023Critical (3)No Ranging Response received - T3 time-out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:08:04 2023Warning (5)Dynamic Range Window violationSat Feb 25 07:08:04 2023Warning (5)RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:08:04 2023Warning (5)Dynamic Range Window violationSat Feb 25 07:08:04 2023Warning (5)RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:08:03 2023Critical (3)No Ranging Response received - T3 time-out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:56 2023Critical (3)SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:56 2023Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:55 2023Notice (6)TLV-11 - unrecognized OID;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:40 2023Notice (6)Honoring MDD; IP provisioning mode = IPv6Sat Feb 25 07:07:37 2023Critical (3)No Ranging Response received - T3 time-out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:19 2023Critical (3)SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:17 2023Critical (3)SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:16 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:07:15 2023Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:06:57 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:06:56 2023Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:53 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:53 2023Warning (5)MDD message timeout;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:47 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:47 2023Warning (5)MDD message timeout;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:44 2023Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 07:05:41 2023Notice (6)CM-STATUS message sent. Event Type Code: 20; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 01:17:56 2023Notice (6)CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;Sat Feb 25 01:17:31 2023Notice (6)CM-STATUS message sent. Event Type Code: 20; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=94:18:65:cb:3c:43;CMTS-MAC=00:01:5c:6b:f0:49;CM-QOS=1.1;CM-VER=3.1;
What does the Internet service provider say?
You'll need a cable expert to help out here. With luck one will be along soon.
What Firmware version is currently loaded?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-routerYou need to have the ISP review and resolve all Errors, Critials and Warning seen in the Events logs.
using latest firmware V2.1.5.2, I have already posted event log
