Hi all,

Here's my backstory: My Antminer S7 batch 7 units had 6 out of 9 boards burnt out within 2 months (back in January/Feburary). Since they were still covered under warranty, I sent them to Bitmain China to repair under the warranty, and spent about $200 shipping the boards for the RMA. It took one month to get the boards back from China after they were "repaired."

Within 30 days, the exact same boards I got back from china under the warranty burnt out again (I've got Batch 8 miners that have been absolutely great since day 1 with no issues). When I pulled out the boards from the miners, every single one of the boards I got back from China under warranty has heat sinks fall completely off.

Rather than go through that trouble again, I decided to send them to Bitmain USA and pay a fee based repair. (bitmainwarranty.com)

They were delivered on June 4th. One month and 4 days later, I still have no idea what's going on with my boards. The last time I heard from them was on June 30th when they said the advanced tech needed to take a look at them. They said the boards couldn't be repaired via normal repair process and needed a "deep repair."

First off, why were my RMA boards dead from bitmain china within a month after I got them back?

Secondly, why are those same boards unrepairable for Bitmain USA, and why is it so painful to get any response? I never overclocked them and ran them in a server room... my RMA'd boards should have never died again within 30 days.

5 of the 6 boards I sent had no burn marks and falling heatsinks. One of the 7 had a slight burn mark under one of the heatsinks. And yet all of them are "unrepairable" and need a "deep repair?"

Has anyone had luck with BitmainWarranty (US fee-based repair)?

The last time they posted on the forum was back in June 13th, so that doesn't make me feel any better.