What does it mean when there is a solid red Power

it means 2 things. 1st it could be the adapter because theres still power to it and 2nd is the 2wire router is already defective. if its possible for you to bring the 2wire with the adapter to any computer store or to att store and have them plug a new adapter on it . or if you have available 5volts adapter you can try to check if power will be solid green using diff adapter definitely its the adapter but if you have tried it but power will flash green or red the modem is dead. powerlight of any router should stay solid green no matter what happen.
have it checked carefully so you dont need to spend $82 for the 2wire, adapter is $10 only..

Goodluck!