Since it bears repeating here is the link to their program again:
https://www.canaan.io/1490.htmlIt is running from May 1, 2023, to December 31, 2023.
Too bad they stopped the program at the A6's. My 1st Avalon's were the A721's that I switched to in protest of Bitmain's attempt to push their new BCH coin by no longer accepting
BTC. You could only pay with wirexfr or use their crapcoin. Coupled with s9 quality going down the tubes around then it was the last straw.
Still have the 2x 721's and 2x 741's followed by a couple dozen 841's and 3x 941's. Of them all they all still work and only 5 failures - 2 fans dying on each of the 721's, one on a 841 as well as 1 on a 941. The only electronics failure is a dead PMU on one of the 841's. Considering the many years of them running 24x7x365 that is one excellent track record.
Those are all offline now of course and were replaced by A10's and one A12 - to-date, zero issues with them.
Only God knows how many s9 fans, hash boards and control boards died on me - at least several dozen