having some issues with an antminer s4
https://i.imgur.com/mm4mS2r.png https://i.imgur.com/bWiB9Ce.pngso I pretty much figured out that I have a bad IO board by putting in a good working one into this miner from another working miner. I am having trouble locating anything on fixing or replacing this board. Anyone have any insight on this?
Your pics lack the asic status. Are all asics showing o's, any - or x's. I do believe there is an updated firmware version you could upload to the S4.
My only troubles I had pointed to the psu which can easily be the cause of everything. What does the front panel screen show it hashing at?
Please be careful taking advice from Meech as he doesn't have a kill o watt & doesn't run tests on his own machine to give u the right advice u need... Oh & did i mention his S4 was in getting fixed last time we checked in...
Please read the comments on the page or so before this & make up ur own mind as to weather u take his advice or not..
Leave your tasteless comments out of the threads and yes I have a kill-a-watt, 3 exactly and a sound meter. My S4 is fixed now, thanks to Yoshi. What have you offered on the forums with your wisdom?
Here is my wisdom Meech
Just wanted to update u all on my latest findings for the S4 for under clocking/volting...
Best underclock using sept 04 2014 image
Running on 240 volts (In Australia)
Using Freq : 100 & Volt : 0670
I get around 980gh @ 640w - (Tested with a kill o watt)
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https://bitmain.zendesk.com/hc/en-us/article_attachments/200965819/s4sep26.img.gzu'll need to unzip this & use hdd raw copy to image this to ur sd card (U'll need to take the sd card out of the miner & do this on ur pc)
This will give u undervolting again...
Now i know this uses an old cgminer & is known to have issues so do this..
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This will install Smit's low fan firmware (To keep noise to absolute min) & cgminer 4.9. It will also survive a reboot...
Connect to your S4 via SSH. We all know that username is "root", password is "admin". Also we all know that we need use PuTTY software
Then we get into /mnt/mmc1 folder:
Code:
cd /mnt/mmc1
Rename initramfs.bin.SD to initramfs.bin.SD.orig (or with any name convenient for you) to make rollback possible:
Code:
mv initramfs.bin.SD initramfs.bin.SD.orig
Then we can download those tho images for slow fans & cgminer 4.9
Code:
wget
http://95.84.240.160:8080/s4_symlink/S4_cgminer_symlink_low_fan.initramfs.bin.SD -O initramfs.bin.SD
Now we are ready to download cgminer. Note that after above steps we have to put cgminer's files to /config/cgminer folder, otherwise mining will not start.
We can now download and put cgminer to the necessary folder with this code:
Code:
cd /config && wget
http://95.84.240.160:8080/s4_symlink/cgminer_4.9.0_S4 -O cgminer && chmod +x cgminer
Now type exit & reboot ur machine.
Any problems please ask or pm..
PLEASE BE AWARE - The slow fan firmware should only be used at the underclocked & undervolted settings... U could start a fire if u use this at full speed!!
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UPDATE
If u can get the J7 board to set the voltages correct on startup (This requires a kill o watt or similar)
To do this u'll need to start & restart the machine till the kill o watt tells u the right voltage / watts...
The amount of restarts is random so just keep trying it till it sets right.
Old settings as above with J7 on the loose will give 640w
With the J7 running correctly it will be 600w, (Tested with a kill o watt) That's another 40w saving....
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Hey Bitmain I believe i finally got ur 0.6w u were original boasting about, Just funny it took ur new product to come to market before
this ever happened..
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I believe this is the maximum savings we will get out of the S4 until someone does a hardware hack...
Be interesting to see if anyone can replicate or better these settings!
Big thanks goes to : sjenja who worked out the J7 problem...