Constant Dropping of one Board Antminer S5! (ALL of THEM)

[gerardo15]

So! me and my friends got each like 8 antminers S5, different batches, using a Corsair CX750M, HP DSP 800GB and DELL N750P on the miners.. we all use different routers, switchs, firmwares, but we all suffer from the same thing.

One of the boards on the miner will turn off for about 6 minutes, and then turn on again, its always the left board if you look the miner from where it pulls air. it happens in ALL the miners! not even one saves from this problem!

Its random, so in the morning it can happen to 2 of them, and in the afternoon to 1.. it can happen twice in 24 hours to the same miner.

How did i find out about it? one day i was checking the miner Hashrate 5 seconds and realized it was hashing under 600 ghs for 6 minutes and then went back to 1.15th, you can even see the red led on the board turned off!

[bmoscato]

I have a couple of S5s each powered by their own EVGA 750 Gold units without issues. These units have been hashing since the S5 was released; I think mine are batch 2.

[alh]

Try switching the power plugs into the hashing boards, and see what happens. If the problem moves, then the issue is the power supply.

[gerardo15]

Try switching the power plugs into the hashing boards, and see what happens. If the problem moves, then the issue is the power supply.

The problem is not because of the PSUs, we tried with different PSUs, like i explained

[notlist3d]

Official ideas:
https://bitmain.zendesk.com/hc/en-us/articles/204875015-How-to-diagnose-S5-hashing-PCB
https://bitmain.zendesk.com/hc/en-us/articles/203559969-My-S5-hashes-at-about-600GH-S

If that does not work try other PSU's as others have said.  Some S5's have a personality and do this.  You will notice it is posted about more then a few times.

[Tupsu]

Obviously, this is boards problem.
They are sometime overheated and now we have some chips with poor contact.

My recommendation. Turn the controller to the other side, so that data cables can be exchanged. It is only four screws, at Controller metal frame.
Check , the error is repeated on the same blades or not.

[gerardo15]

Obviously, this is boards problem.
They are sometime overheated and now we have some chips with poor contact.

My recommendation. Turn the controller to the other side, so that data cables can be exchanged. It is only four screws, at Controller metal frame.
Check , the error is repeated on the same blades or not.

Come on, i would know if the problem it's the controller board im talking that 22 miners from different batch do the same thing! and people here come and say to check the PSUs.. it's like they are not reading what i typed..

What are the odds that me and my friends have bought 22 miners with the left BOARD with problems???

[Tupsu]

Obviously, this is boards problem.
They are sometime overheated and now we have some chips with poor contact.

My recommendation. Turn the controller to the other side, so that data cables can be exchanged. It is only four screws, at Controller metal frame.
Check , the error is repeated on the same blades or not.

Come on, i would know if the problem it's the controller board im talking that 22 miners from different batch do the same thing! and people here come and say to check the PSUs.. it's like they are not reading what i typed..

What are the odds that me and my friends have bought 22 miners with the left BOARD with problems???

What are the odds that You  and You friends have bought 22 miners with the controller board   problems???

[RichBC]

One of the boards on the miner will turn off for about 6 minutes, and then turn on again, its always the left board if you look the miner from where it pulls air. it happens in ALL the miners! not even one saves from this problem!

Sounds extremely unlikely. How do you know that the left board turns off for 6 minutes?

Rich

[gerardo15]

One of the boards on the miner will turn off for about 6 minutes, and then turn on again, its always the left board if you look the miner from where it pulls air. it happens in ALL the miners! not even one saves from this problem!

Sounds extremely unlikely. How do you know that the left board turns off for 6 minutes?

Rich

You will see the miner hashing bellow 700 GHS, and if you take a closer look to the miner the RED LED is off, after 6 minutes the RED LED turns back on the board temperature rises from 30 C to 50 C again (if you touch the heatsink while the RED LED is off you can feel it's cold

[philipma1957]

Try switching the power plugs into the hashing boards, and see what happens. If the problem moves, then the issue is the power supply.

The problem is not because of the PSUs, we tried with different PSUs, like i explained

okay lets start right here.

you have s5's correct?

every psu you use is a bare minimum psu.  they all should be able to supply enough power yet they act like they don't.

So first question is on each psu do you :

 use 4 cables from the one psu into 1 s-5  or do you use 2 cables from 1 psu into 1 s-5?

Next question is the gear in different locations with different internet.  Or all in the same location?

Next question do you mine on the same pools or different pools?

[gerardo15]

Try switching the power plugs into the hashing boards, and see what happens. If the problem moves, then the issue is the power supply.

The problem is not because of the PSUs, we tried with different PSUs, like i explained

okay lets start right here.

you have s5's correct?

every psu you use is a bare minimum psu.  they all should be able to supply enough power yet they act like they don't.

So first question is on each psu do you :

 use 4 cables from the one psu into 1 s-5  or do you use 2 cables from 1 psu into 1 s-5?

Next question is the gear in different locations with different internet.  Or all in the same location?

Next question do you mine on the same pools or different pools?

1- We use 4 Cables from one psu into 1 S5

2- They are all in different locations

3- Different Pools.. Nicehash, Antpool, Bw

[RichBC]

Well assuming this is not a wind up. and I only say that because S5 has been round for some time and I have never seen the same problem or seen it reported before. So a couple of questions & ideas.

First carry out all the suggestions above, do not reject ideas because you do not think they will work as these people are very experienced. In particular do try reversing the controller board as described by Tupsu as it is far from certain that the problem will stay with the controller board or swap to the other. I think you should also swap the fan to the other end of the S5 to keep the airflow the same.

I have seen a single hash board drop on my S5, it's a rare occasion, and a lot of the time was when I was playing with reducing the 12V to undervolt them. Usually when doing this one hash board would drop out before the other. But here's an odd thing. On all occasions when I have seen a single board drop out I have never had it recover on it's own. I have always had to reboot, which you do not seem to have to do?

So what other info do you have? What frequency are you tuning at? Worth trying dropping it a notch or two and see if that fixes the problem?
Finally can you think of any common factor between this "group" of S5's that might not be present generally? Mains supply, temperature, location etc?


Rich

[grn]

I have one s5 that behaves the same way. set up a crontab entry with cgminer -restart every 6 hours

[notlist3d]

Obviously, this is boards problem.
They are sometime overheated and now we have some chips with poor contact.

My recommendation. Turn the controller to the other side, so that data cables can be exchanged. It is only four screws, at Controller metal frame.
Check , the error is repeated on the same blades or not.

Come on, i would know if the problem it's the controller board im talking that 22 miners from different batch do the same thing! and people here come and say to check the PSUs.. it's like they are not reading what i typed..

What are the odds that me and my friends have bought 22 miners with the left BOARD with problems???

What are the odds that You  and You friends have bought 22 miners with the controller board   problems???

I think this must be a tad exaggerated. Just the chances of 22 miners having same problems are slim.   Did the same person setup all of these miners?

I read the PSU's do you have any that are a little bit higher quality?  Those are all ok... none great.  But I suggest posting some networking screens, status screen, etc.   I think 22 miners something chances are something was set wrong.

[Tupsu]

If 22 miners are the same controller board problem, it can only be problem in the software.

That was the answer I was hoping to read here.

[gerardo15]

Obviously, this is boards problem.
They are sometime overheated and now we have some chips with poor contact.

My recommendation. Turn the controller to the other side, so that data cables can be exchanged. It is only four screws, at Controller metal frame.
Check , the error is repeated on the same blades or not.

Come on, i would know if the problem it's the controller board im talking that 22 miners from different batch do the same thing! and people here come and say to check the PSUs.. it's like they are not reading what i typed..

What are the odds that me and my friends have bought 22 miners with the left BOARD with problems???

What are the odds that You  and You friends have bought 22 miners with the controller board   problems???

I think this must be a tad exaggerated. Just the chances of 22 miners having same problems are slim.   Did the same person setup all of these miners?

I read the PSU's do you have any that are a little bit higher quality?  Those are all ok... none great.  But I suggest posting some networking screens, status screen, etc.   I think 22 miners something chances are something was set wrong.

Each of us setup the miners, but out of curiosity.. miners are basicly plug and play, you just connect 4 PCIE, connect RJ45, set up pools.. leaving default frecuency on all miners. All temperatures are bellow 58, where could posibly be room for a wrong setup?

[Tupsu]

Use this Firmware


https://bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

[gerardo15]

Use this Firmware


https://bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

That's the one im using in all my miners, tried smiths firmware too. nicehash firmware too.

[VirosaGITS]

Use this Firmware


https://bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

That's the one im using in all my miners, tried smiths firmware too. nicehash firmware too.

I have the exact same "problem" i decided to just ignore it as overall its 2-3ghs loss;

I posted about this in several places and got a few replies but nothing helpful. I can sum it up to people posting the same 101 troubleshooting suggestions and a handful of others saying they have the same problem.

It still happen once or twice a day. Its the top blade if you look at it in the webserver in miner status.

It look like a sharp dip in the pool's graph everytime;


Typically only last 2-3 minutes.

Edit: My S5 is batch 7 (used from bitmain) on the latest PCB.