Quote from: Mudbankkeith on June 28, 2014, 07:03:34 AM

Quote from: tripppn on June 28, 2014, 04:10:01 AM

Quote from: HypnoticGuy on June 27, 2014, 11:29:29 PM

Can anybody possibly offer me some guidance here please?

I sold 3 Antminer S1s on eBay, and when they left here they were working perfectly. The 3 units are stacked, one on top of the other.

Photo of the units: http://www.cryptocointips.com/s1s.JPG

The person who received the units is telling me that one of the boards on the middle unit is not powering up. Supposedly the top unit works fine, and the bottom unit works fine. But only 1/2 of the middle unit is working.

This is pretty obviously a power problem, but I don't have a unit here to even look at to see if I can suggest something.

Any help would be appreciated.

Thanks!

Have him hook up the one that's not working by itself to rule out the power as the cause.

Swap the power supplies around, I have some that throw a strop but only in certain psu/board combinations.
Spent a few hours swapping psu around to find the best mix.
Some S1 boards draw a lot more power than others, for the same hashing rate.

Actually, I think that did it. Thanks. I suggested the buyer try this, and a couple hours later he told me that he got it figured out. Not sure if he even tried this, but I did suggest it, and it is now working.

Thank you very much for the suggestion.