RMA accepted. The miner should be up and running again in a month.
Why a month? It took me less than one week to RMA one dead board starting with my first e-mail to them and ending with powering the board up.
Holidays usually adds quite a few days each way when mailing packages. Even with express shipping which adds $150 to the shipping cost they would not guarantee the package would arrive at KNC before december 30th. If I'm lucky I receive the replacement board in the first week of January.