S9 13.5T antminer fans don't go full speed after re-flash firmware

[moftkhor]

Hi!

One of my S9's went into error and didn't hash anymore so I flashed my firmware.
After that, it started mining again but my fans don't switch to full speed even after 9TH... temperature rose above 100°C so I quickly rebooted the miner and switched off the asics so it would cool down.

Anyone have any ideas how to solve this? Been trying several firmwear versions all day, can't get it to work properly...

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[philipma1957]

Power 1 hash board at a time

see what happens.

If it works mark it

Power second hash board see what happens

My guess is you have 1 bad hashboard.

By testing one at a time you will find the bad one.

[Artemis3]

Hi!

One of my S9's went into error and didn't hash anymore so I flashed my firmware.
After that, it started mining again but my fans don't switch to full speed even after 9TH... temperature rose above 100°C so I quickly rebooted the miner and switched off the asics so it would cool down.

Anyone have any ideas how to solve this? Been trying several firmwear versions all day, can't get it to work properly...

Do you want your fans at 100% all the time no matter what? Solution is easy, take out the fourth wire from the 4 pin fan plug, could be blue. Its possible to remove it by carefully releasing its plastic lock, and it can be put back again at anytime, no damage.

Never again your fans will ever be at any other speed than 100%.

Do try the above mentioned for a "proper" solution.

[moftkhor]

I downgraded the firmware to the original version. Now none of the boards are working... As soon as I upgrade to an upper version, all 3 boards work, but the fans don't go full speed, so the boards get too hot.
Somehow the fans aren't working along.

1 fan keeps turning around 720 rpm, the other around 4560 rpm... While on all my other miners I got  4200 & 6120.

I think I'm installing the wrong firmware version. Does anyone know which one is exactly the right one for the S9_13.5T?

[BitMaxz]

All firmware from Bitmain for s9 is compatible with your miner but some of the firmware has some bugs.

You can try to flash the miner with this one "Antminer-S9-all-201711171757-autofreq-user-Update2UBI-NF.tar.gz" this is a well-known most stable firmware that can fix some hashrate issue.

If you are having some issue on Fan Speed you can manually set the fan  to high speed you can follow the guide from here "Solution for ANTMINER S9 FANS SPEED Up & Down every 20 Seconds."

[moftkhor]

You can try to flash the miner with this one "Antminer-S9-all-201711171757-autofreq-user-Update2UBI-NF.tar.gz" this is a well-known most stable firmware that can fix some hashrate issue.

Yeah that's exactly the one I flash it to each time and none of the boards work. But when I flash the LPM version on top of that one, they all work and again, fans don't go full speed. The temperature keeps rising... Got the same problem on another S9. So I got 2 S9's that aren't working properly after installing these firmware's. Should I somehow format them or something first?

If you are having some issue on Fan Speed you can manually set the fan  to high speed you can follow the guide from here "Solution for ANTMINER S9 FANS SPEED Up & Down every 20 Seconds."

I just tried this too, doesn't get my fans to full speed either... This is soo weird! I tried everything all day long... I'm positive it has something to do with my firmware. It would be too much coincidence for 2 of the same miners to have the same issue after a firmware upgrade... I highly doubt having any hardware issues...


What's the proper way to completely re-flash these miners to the original firmware?

I've already tried SD flashing t9+ -SD Tools.zip on to my S9.
Then I flashed using the webbrowser Antminer-S9-all-201711171757-autofreq-user-Update2UBI-NF.tar.gz on to it.

None of the boards then worked. The red led lights on them didn't even turn on.

Then I flashed Antminer-S9-LPM-20181102.tar.gz on top of Antminer-S9-all-201711171757-autofreq-user-Update2UBI-NF.tar.gz and my boards all 3 started working, but the fans just won't spin full speed.

I don't know what I'm doing wrong...

[BitMaxz]

Yeah that's exactly the one I flash it to each time and none of the boards work. But when I flash the LPM version on top of that one, they all work and again, fans don't go full speed. The temperature keeps rising... Got the same problem on another S9. So I got 2 S9's that aren't working properly after installing these firmware's. Should I somehow format them or something first?

It seems the issue is in your power supply since the miner is working with "Low Power Mode" do you have any known working power supply to test? Or if you have multi-tester check the output voltage of your PSU it should show 12v each.  

Since the miner is working again with LPM but getting low fan speed why not apply the method that I suggested above where you can manually set the fan speed at 100% and let us see if the RPM speed of the fan will increase.
Or follow this video to set the fan speed at full speed by adding some code through SSH https://www.youtube.com/watch?v=D3U_YPuN77g
according to the video he set the fan speed at 65% so replace it with 100% to run the fan at full speed.

[moftkhor]

Yeah I got 20 exact same S9's here. I'm going to try changing the control board to double check the hash boards and fans all are still ok. If so, then I'm positive it's a firmware issue...

[moftkhor]

Ok for anyone interested, I found the issue on both my miners.
The intake fans were malfunctioning. I ordered 2 new ones, changed them and voila! Everything works perfectly now.

[mikeywith]

One of my S9's went into error and didn't hash anymore so I flashed my firmware.

It probably stopped hashing because temps were high and the miner went to protection mode, times like these are where reading the kernel log will most likely tell you the exact the problem , but instead you went ahead and flashed a different firmware without having figured the cause.

however , I am not sure how did the LPM firmware allow you to hash with a faulty fan, before it start hashing it has to test both fans for a little while and if they are under about 4000 RPM it will show a fan error and won't start hashing.

I would also inspect the fan grill , I had some bad grills slightly touching the fan motor causing the fan to run slower and wear out way too soon, this can be fixed by removing the grill and bending it a little bit to the outside to allow more room for the fan motor not to touch the grill.