when its blinking its searching for an upstream/downstream signal. did you activate it through your isp? 

did you check the coax or contact the isp?

Hello lvernon,

If S33 is blinking green make sure that cable signal levels are on acceptable range . 

Follow the link below to check on the same :

http://arris.force.com/consumers/articles/General_FAQs/S33-Cable-Signal-Levels

Do share the values of Downstream and Upstream Channels 

i.e  the lowest and highest value of power levels /snr / number of channels in Downstream and power levels /number of channels  in Upstream 

Note: Check if co-axial cable is connected tightly and activated the modem with your Internet Service Provider (ISP)