ToolJoe,
Not talking 2Wire specifically -
Caps are notorious, and trust me you cannot always visually see a bulge or leaking cap. I don't have an ESR meter so I have to lift them to check. They probably using cheap no-brand caps.
If you replace them, use caps with a higher voltage rating.
Hey guys, I was going to post this in another forum (and maybe some other day to help others... plus if google brings 2wire users here... they might want to buy a dewalt tool

) but from what I have read in that forum, the people are none appreciative.... they act like they have everything figured out... anyways. I work as a maintenance guy and recently (the apartments just got internet) I have noticed that the 2wire brand modems/routers power supplies go bad quick (by quick I really mean withing at least 2 years). I already have the tale tale sings of the issues... they are not always the same, but over all, it will most likely be a power supply problem if you are having connection issues... trust me, even if the modems light are on, does not mean that the power supply is good...
Guys it is very educational, I learned something from your post. keep posting