If your 2Wire 2701HG-B DSL modem/router/wireless acts strangely, it's probably the power supply. I decided it was time to fix some 2Wire power supplies:
Three of the five had visibly bulging caps. I replaced the caps (1000uF 16v) in all five power supplies as all of them showed high ESR.
Cracking the case is easy. Insert in bench vise equipped with rubber covered jaws, and compress until you hear the glue crack. Repeat for all sides and it should just pop open. Duco cement to seal back shut. Test with a 3.3 ohm 10 watt load resistor for 5.1VDC.
Repair before Recycling.