Topic: ANTMINER S2 Discussion and Support Thread - page 30. (Read 355730 times)

My guess is that it's software related, the system doesn't seem very stable.

I don't know exactly why, but it does-I had exactly the same problem and this is what fixed it.
Boards are not exactly the same size, so, I guess, they fit better in different places on the control board.

If not paste, why / how would swapping bays with another blade help ?

I've seen others report this xxx000 thing before.

i had see someone to tell to put in and put out the sd card
untill the board start again boot
but i do not remebe very well the steps any details
please

After having no setup issues and running great for the last couple of weeks, I woke up this morning to find my batch 1 AntMiner S2 not hashing, fans going full speed, panel dim and the red light solid. Recalling that others here have had the same issue, I went back and skimmed over the previous posts and found that the likely issue was probably a corrupt SD card. That was indeed the case, as I am now back up and running, and I figure the problem started when a brief power outage occurred here this morning. Thought I would briefly summarize what I did to recover, which may be of special interest to those folks using a Mac to write to their SD cards:

- ran to the store and bought a 4gb Sandisk microSD card. They didn't have any class 10 cards, only class 4, but it seems to work (ordered a couple class 10s from Amazon for backup).
- Downloaded onto my MacBook the latest firmware from the bitmaintech website, as well as the SD card image from https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip (thanks 1l1l11ll1l)
- put the new microSD card in the adapter, shoved it into my MacBook, read through the guide at http://elinux.org/RPi_Easy_SD_Card_Setup, and then ran these commands in Terminal:
   cd Desktop (my bitmain.img was on the desktop)
   diskutil list (to find the disk name of SD card, mine was disk2, so replace disk2 below with what yours is)
   diskutil unmountDisk /dev/disk2
   sudo dd bs=1m if=bitmain.img of=/dev/disk2 (this took 30 minutes to complete)
- once SD card was ready, I opened up the AntMiner, pulled out the BeagleBone card, swapped SD cards and reassembled
- powered up, and it started hashing again. Connected to the miner from the browser, uploaded the latest firmware, changed to point to my pool, and everything was golden.

Much thanks to all of previous posters that talked about this issue, as your help got me back up in hours as opposed to days.

So, my S2 I got recently hasn't been running smoothly. After some testing and experimenting it now runs stable with 9 blades. With 10 blades I could get it to run about 12hrs at 1th before it started dropping hashrate. If I then restarted the miner process some blades would show up as bad or with x's and I would only be getting 700gh+. With 9 blades, it's running smoothly at 900gh/s for 24hrs+. The one card I removed has only a faulty temp sensor. Does anyone know where it's located on the blade? Or is it inside the chips?

I think the PSU is the problem but don't know 100% yet.