Attention: The warranty interval for control boards with emblem is a hundred and fifty times (calculated from your date of cargo), and those without emblem are certainly not protected with the warranty. Developed with industrial-quality components, the S19 control board withstands the rigors of continuous operation in Specialist mining facilities. https://antminercontrollboardsfor60126.blogscribble.com/37681141/indicators-on-antminer-k7-control-board-you-should-know