Modem downstream led blinking no upstream led and restarting

[fighteriris]

As the subject, the downstream led is keeping blinking while no upstream led. After a while, modem restarts by itself. So far, there is no outage reported. No sure what is going on with Xfinity.

[plemans]

if you have any splitters, attenuators, or amplifiers in the coax line, I'd recommend removing them. 

check the coax cable for damage, kinks, corrosion, loose connections. preferably more it to where the coax enters the home. 

Then log in and get a screen snip of the cable connections page and the modem logs and post them back on here