Arris G18 stuck in a reboot loop

The G18 bootup process takes longer than other SURFboard gateways.  After successful activating, a firmware update is pushed from our server to the G18 which will result in multiple reboots.  The LED is Amber when the unit is rebooting.  

Could you please let us know the name of your internet service provider and the speed plan which you subscribed from them?

When your gateway starts rebooting on its own, it could be due to poor signal reception or power fluctuations. To address this, try plugging the gateway into a different outlet. Additionally, to rule out service-related issues, check the cable signal levels.

Please refer to the link below for instructions on how to check your cable signal levels:

http://arris.force.com/consumers/articles/knowledge/G18-G20-Cable-Signal-Levels

If you find that the signal levels are not within the recommended range, we suggest contacting your Internet Service Provider (ISP) to have them reviewed and adjusted as needed.

My ISP is Comcast. Speed plan is 400Mbps.

All signal levels are with specs. Power source is reliable.

While investigating the rebooting issue I watched the Modem reboot no less than 10 - 12 times.  It wasn’t until I performed the “Restore WIFI Defaults” action that the Modem began functioning normally.  It worked normally for about a week until one morning the Download speed was at 1.33 and upload  at 1.10  I powered the Modem off/on and it returned to normal and has been working normally for a couple days now. I don’t know what’s going om with it. Please advise. Thank you.