Amber Upstream Light

I have the same problem too but except I used to have a solid amber and get internet connection and then after a while the internet connection goes away even when the light turned green but still receive the wireless radio and sometimes I won't get the full download speed. Now presently after restarting a bunch of times and hard resetting maybe twice even unplugging the power cable and plugging it back in, I am currently having a solid amber upstream light and a green blinking downstream light with internet connection that's not really stable. I don't know if the green blinking is an issue. I have Xfinity Comcast as my isp. Please tell me what the issue is and how I can fix it?! Here are my upstream and downstream.