Has anyone had to do a warranty return/repair? I have a hashboard that doesn't show up anymore on the status page.

This is what happened: I was running Blissz and it was showing me inflated hashrates on chain0 and failing with xxxx's. I rebooted and changed frequencies/voltages but nothing seemed to help. I switched back to the stock firmware and after some trial and error I was able to get chain0 to run normally. It ran for a couple of days and then just disappeared from the status page. I saw in the kernel log that it shows chain0 as having an asic count of 0 instead of 60. Also, I tried switching out the cables connecting the chain with cables that are known to work, and changing the slot it is connected to. I saw Bitmain also recommends reflashing the stock firmware and letting it run for 20 minutes, so I tried that as well. None of that worked, so it would seem the board is dead.

I don't know if I need to post on their support forum first asking for help, or if I can go ahead and create a help ticket, disassemble the D3 (removing chain0) and package up the faulty hashboard. Anyone know what the standard procedure is?