Did you check your modem (2wire) and see if the eternet light is solid green or the dsl light solid as well, maybe the eternet cable is defective or loose, did you try everything. Like checking the lines, are they all good? What happens after it boot from db220 logo and stuff, did it froze or something, did you try and unplug everything for a minute? Maybe try unplug the modem for a minute and plug it in, maybe it'll refresh on it own.
Let me know how everything goes.