Quote from: pikachuy on October 23, 2014, 09:19:52 PM

Quote from: manitu on October 23, 2014, 09:03:13 PM

Quote from: Prelude on October 23, 2014, 08:55:22 PM

Quote from: manitu on October 23, 2014, 08:51:49 PM

Hi, yesterday I received an email about sending 3 new PSUs and information that other 7 will be shipped ASAP. I was really happy because I have had 3 miners without PSUs, but not for a long time. Nowadays I have 10 pcs S4 B1 and 10 pcs S4 B2 and a lot of S3+ miners.

Today morning when I arrived to work I smelled burnt stink. Employees were scared, called me and ran around. WTF I said for myself. I hoped that the reason for all arround was not caused by miners but I was not right. I looked at the miners and two of them were down. Immediately I switched off all breakers dedicated for miners. And yes, one miner had PSU burned down. It was very easy to find which miner was bad Sad

It was the fourth failed PSU. I checked all breakers and only one was switched off automatically.

When the smell disappeared from the building (after 2 hours) I started with switching on the breakers one by one. After that I switched on PSUs on S4s. But another one from B1 and also one from B2 could not start. Also fans were stopped. I tried to reconnect the power but nothing helped. I have not understood what happened. All miners were running more than one week continuously.
The PSUs do have really some problems. I hoped that PSUs in B2 were good, but....or today is only bad day for mining

Today status is 5 failed PSUs from 10 pcs from B1 and one failed PSU from 10 pcs from B2.

Can you confirm that the B2 miner that failed had a sticker on it? Early B2 units were shipped out with defective PSU also. You can see it by removing the top, no need to remove the PSU. (on my B2 anyways, maybe the sticker is elsewhere on others)

Yes there is a sticker. On the other hand I have to say this B2 has a bit different inside in comparison with B1.

If there is no barcode sticker on the PSU, then your PSU is still from the defective batch. For the one's that died and have a barcode sticker on the PSU, did you overclock them or they all running stock? Wondering if the extra overclocking is putting stress on the PSU overtime.

I am sure that this is new one not from defective batch. I have had default setting with cgminer from Ckolivas. Maybe when sticker went down the PSU had stress or something else...