Topic: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping) - page 10. (Read 107983 times)

I think that's a bit low.

 Do you have to ship it to China?  What's the cost?  I have a board that went as well but I was thinking it isn't worth the shipping fee to replace.

sale at bitquan com

How whe can use your image on a regular PC and where i can found the USB to connect the prisma cable?

No I think that is the standard minera build

Who did you contact with AM? Phasebird?

I had a board go out on a tube.
I contacted support and they told me to ship it back and they'd replace it.

My experience with AM support has been pretty amazing.

Finally got more prisma to debug!

Please checkout https://github.com/blockerupter/cgminer, I pushed my update of prisma driver to blockerupter's repo.

This update should fix board detection issues and many of the sync errors.

Is CrazyGuy RaspPi .image available for download somewhere?

I went to this link

"https://github.com/crazybitcoinguy/minera"

and downloaded the latestest minera from this link

"Download minera-latest.img.zip."

I tried switching over and didn't see "AMcg". I couldn't get any settings to save like pool or anything and Minera is showing 800 as the defaults frequency. What am I missing here? Is that not crazyguy's Raspi image?

I would take a chance on it for .6 btc

Sorry my updates are not more forthcoming I'm a little burnt (ha) from troubleshooting these:

So this is the back of the board that caught fire, I can see a spec of copper burned through the pcb in a tiny spot where on the opposite side is one of the burned out asics:



Here is the top side of the board, two views:





I had just fired it up from an off state, where it had previously ran for about a week now, fire started about 10 seconds in. Thank god I was there, I saw flame like a candle and was able to pull power immediately.

Just so you know it is very cold in my mining rooms right now, ~50-60F or even colder at nights. My cointerra is my most heat sensitive miner and it is running cool and stable.

Out of 8 prismas, or 32 boards:

4 have transistors that climb to 80C+ whereas all other boards exhibit 30-60C. They will sometimes still hash, but slowly, and the tube heatsink is really that much hotter because of it. Burning hot. And some of these only exhibit the problem on half of the hashing board.

8 have power down / hashing issues. Suspecting bad chips on these boards. They hash, albeit slowly and reset and generally I am blaming these boards for breaking the daisy chain and causing the others to have problems.

1 has burnt out on me now

I'm not trying to smear asicminer and have no agenda. I am disappointed with these problems. I had some plans that were in holding pattern waiting for the all clear and now they need some rewriting.

I would be happy if someone from asicminer would just offer me replacement of the bad boards. I've lost downtime but it will be more loss without any hashes. Overall this was more of a test run to see if it was worthy to order in bulk. The ones that do run, run well.

I'm willing to sell my Prisma at a discount if anyone wants one with a missing capacitor that I couldn't get to hash more than one board at a time...  It has the USB dongle and not the controller...

Thx

I've seen this error before and so have a few others. Restarting cgminer or rebooting the pi has fixed it for me. Also, it looks like ASICMiner checked in some updates to their cgminer branch around 5 hours ago, targeted at fixing BE detection errors. I recommend running the buildminer.sh script to rebuild the AM branch of cgminer and try again.

Just tried that command and it appears to have no change / no hash

Try the right uart port on 1 prisma board going directly to your Raspberry Pi, and nothing plugged in to the left port. Also try switching usb ports on the RPI

Does cgminer give off any errors? It could also be a permissions issue if minera wasn't installed properly. Running the following command should ensure that the minera user has the necessary group level for device access.

usermod -a -G dialout,plugdev,tty,www-data minera

Good tip.  I'm getting these error messages:

 [2014-11-15 19:31:22] blockerupter: Read (0/1)
 [2014-11-15 19:31:22] BET0: Unexpected value 00 received
 [2014-11-15 19:31:22] BET0: BlockErupterRead (amt=0 err=-7 ern=25)
 [2014-11-15 19:31:22] blockerupter: Read (0/1)
 [2014-11-15 19:31:22] BET0: Unexpected value 00 received
 [2014-11-15 19:31:22] BET0: BlockErupterRead (amt=0 err=-7 ern=25)
 [2014-11-15 19:31:22] blockerupter: Read (0/1)
 [2014-11-15 19:31:22] BET0: Unexpected value 00 received
 [2014-11-15 19:31:22] BET0: BlockErupterRead (amt=0 err=-7 ern=25)
 [2014-11-15 19:31:22] blockerupter: Read (0/1)
 [2014-11-15 19:31:22] BET0: Unexpected value 00 received
 [2014-11-15 19:31:22] BET0: BlockErupterRead (amt=0 err=-7 ern=25)
 [2014-11-15 19:31:22] blockerupter: Read (0/1)

This hardware is absolute garbage...they must know it given the lack of replies to this thread. I hope people read up on these and order something else. I got burned on the "Tube" and this P.O.S. never again though.

I am still having many random problems but especially: I had a board flame out on me last night, pics will be uploaded tonight. Be careful out there.

To Chris, try enabling the debug log and hit the play button on the dashboard in minera for the log, does that give you any more insight?

To others, I get the bet XX errors with the minera lots of times, seems random at best. Tried switching from rb to am cg branches, have yet to get 2 prismas connected to one pi properly.

Ok thanks.

I ended up putting CrazyGuy's build of Minera on a r-pi and still no hashing.  I think that minera can see the Prisma but no work is being done.  I checked both my pool and the default minera pool and they don't work either.


Maybe I have the wiring on the board wrong?  The top board is board 1 (or 0 according to the switches) switch 5 is 'off' on all boards.  I even tried minera with only board 1 plugged in a still nothing