HELP! Antminer s7 problem

[apederzoli]

Hi,
hope someone can help me.
Yesterday one of my S7 suddenly stopped hashing and started beeping.
When I restarted it one of the has boards instead of showing oooooo just showed ---------, what the miner would do is that it started hashing for a couple of minutes and then stopped.
They miners are in a controlled environment with several other miners with constante temperature of 55 C.
Also tried with all 3 hashing boards connected change the frequency to 250 and same thing happened.
I tried to test connecting just one board to see which one was not working, with just one board connected it starts hashing normally for a few seconds, then the miner restarts as usual and when it comes back up the temp on the hash board is 95 so it stops hashing.
I tried with the second board, only that board connected and same thing happened.
Tried with different terminales and cables on the PSU.
Haven't tried with the last board since I don't want to damage them.
Could it be the PSU? Any advise would be greatly appreciated.
Thanks

[1715094022]

1715094022

[1715094022]

1715094022

[1715094022]

1715094022

[sidehack]

And you verified that both fans are spinning proper speed?

[apederzoli]

And you verified that both fans are spinning proper speed?

Yes, they are

[MyRig]

One thing could be the fan power connectors could be in the long plug positions.

Make sure the front Fan is in FAN1 and the rear fan is in FAN3 position

PICTURE HERE

If the fan connectors are in the correct position, please make sure the both fan(front & back) are functioning.  Sometimes if one fan works, the other fan may spin due to the air pressure but may not be functioning. 

If the fans are working correct, then your hash PCB needs repair.  If it hash at the initial power on, you may want to get it fix while it is still fixable.

If you are in USA you can ship it to Colorado, or you can send it to Hong Kong for repair.

Hi,
hope someone can help me.
Yesterday one of my S7 suddenly stopped hashing and started beeping.
When I restarted it one of the has boards instead of showing oooooo just showed ---------, what the miner would do is that it started hashing for a couple of minutes and then stopped.
They miners are in a controlled environment with several other miners with constante temperature of 55 C.
Also tried with all 3 hashing boards connected change the frequency to 250 and same thing happened.
I tried to test connecting just one board to see which one was not working, with just one board connected it starts hashing normally for a few seconds, then the miner restarts as usual and when it comes back up the temp on the hash board is 95 so it stops hashing.
I tried with the second board, only that board connected and same thing happened.
Tried with different terminales and cables on the PSU.
Haven't tried with the last board since I don't want to damage them.
Could it be the PSU? Any advise would be greatly appreciated.
Thanks

[anakinisme]

Hi,
hope someone can help me.
Yesterday one of my S7 suddenly stopped hashing and started beeping.
When I restarted it one of the has boards instead of showing oooooo just showed ---------, what the miner would do is that it started hashing for a couple of minutes and then stopped.
They miners are in a controlled environment with several other miners with constante temperature of 55 C.
Also tried with all 3 hashing boards connected change the frequency to 250 and same thing happened.
I tried to test connecting just one board to see which one was not working, with just one board connected it starts hashing normally for a few seconds, then the miner restarts as usual and when it comes back up the temp on the hash board is 95 so it stops hashing.
I tried with the second board, only that board connected and same thing happened.
Tried with different terminales and cables on the PSU.
Haven't tried with the last board since I don't want to damage them.
Could it be the PSU? Any advise would be greatly appreciated.
Thanks

If i'm not mistaken, one of your fan is not working. Get a new fan if it's not working. Should be fine once change.

[apederzoli]

Thanks all for your replies.
So I haven't been able to figure out exactly what the problem is.
I ordered 2 new fans that should be getting tomorrow just to rule out a fan problem.
will update if that makes it work.

[apederzoli]

Ok, so the new fans arrived today.
I installed them and miner is working properly.
The only problem now is that it is not detecting one of the hashing boards.
any ideas?

[not.you]

Ok, so the new fans arrived today.
I installed them and miner is working properly.
The only problem now is that it is not detecting one of the hashing boards.
any ideas?

Turn it off and then make sure all of your cables are connected correctly and securely.  Then power it on and see what it does.  If, during your previous testing, you powered a hashboard without powering the controller you may have damaged it, it is also possible it was damaged by heat since it appears that you have established that you had a fan problem.

[anakinisme]

Ok, so the new fans arrived today.
I installed them and miner is working properly.
The only problem now is that it is not detecting one of the hashing boards.
any ideas?

1 of your board might be dead due to you didn't realize your fan is dead. Send it to repair.

[Tupsu]

Ok, so the new fans arrived today.
I installed them and miner is working properly.
The only problem now is that it is not detecting one of the hashing boards.
any ideas?

1 of your board might be dead due to you didn't realize your fan is dead. Send it to repair.

It's not worth the repair and 2 x postage costs.

[anakinisme]

Ok, so the new fans arrived today.
I installed them and miner is working properly.
The only problem now is that it is not detecting one of the hashing boards.
any ideas?

1 of your board might be dead due to you didn't realize your fan is dead. Send it to repair.

It's not worth the repair and 2 x postage costs.

Repair service available for Antminer s7 and s9 board! At affordable rate!
PM me for more details!

[dukester99]

Looks like I am having the same problem with my antminer s7 . One of the fans is not working. Anyone have a link for a good replacement fan?

[gt_addict]

Www.eyeboot.com sell replacement fans. I've just bought two from them for my S9 (to try and get the noise down with matched fans rather than two different ones it came with) and they work great. Not bad on price either. They come from china but delivery was only a few days after an initial communication error.

[dogjunior]

Www.eyeboot.com sell replacement fans. I've just bought two from them for my S9 (to try and get the noise down with matched fans rather than two different ones it came with) and they work great. Not bad on price either. They come from china but delivery was only a few days after an initial communication error.

I thought you were not suppose to do this. From what I have read, the input fan needs to be slower than the output fan due to back pressure.

If sound is more important than cooling then having equal fans could reduce noise.

[gt_addict]

Www.eyeboot.com sell replacement fans. I've just bought two from them for my S9 (to try and get the noise down with matched fans rather than two different ones it came with) and they work great. Not bad on price either. They come from china but delivery was only a few days after an initial communication error.

I thought you were not suppose to do this. From what I have read, the input fan needs to be slower than the output fan due to back pressure.

If sound is more important than cooling then having equal fans could reduce noise.

Well ive not noticed any problems so far. Ambient temp is 20c, PCB 49-51c, CHIP 80-81c. Been running like this for 3 days now without any issues.

[Biodom]

Www.eyeboot.com sell replacement fans. I've just bought two from them for my S9 (to try and get the noise down with matched fans rather than two different ones it came with) and they work great. Not bad on price either. They come from china but delivery was only a few days after an initial communication error.

I thought you were not suppose to do this. From what I have read, the input fan needs to be slower than the output fan due to back pressure.

If sound is more important than cooling then having equal fans could reduce noise.

hey, where did you find that input fan is slower?
all i see on the specs for B22 and B23 is that front fan is 6000rpm and back one is 4300rpm
thanks

[Jackhalo3]

Hi,
hope someone can help me.
Yesterday one of my S7 suddenly stopped hashing and started beeping.
When I restarted it one of the has boards instead of showing oooooo just showed ---------, what the miner would do is that it started hashing for a couple of minutes and then stopped.
They miners are in a controlled environment with several other miners with constante temperature of 55 C.
Also tried with all 3 hashing boards connected change the frequency to 250 and same thing happened.
I tried to test connecting just one board to see which one was not working, with just one board connected it starts hashing normally for a few seconds, then the miner restarts as usual and when it comes back up the temp on the hash board is 95 so it stops hashing.
I tried with the second board, only that board connected and same thing happened.
Tried with different terminales and cables on the PSU.
Haven't tried with the last board since I don't want to damage them.
Could it be the PSU? Any advise would be greatly appreciated.
Thanks

I would try upgrading to the latest firmware version. If that doesn't fix it, then consider sending it to Bitmain or Bitmain Warranty if you are in the U.S.