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Author Topic: S17 issue solved. Restored power to 3rd board. May be a common issue.  (Read 117 times)
PopoJeff
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December 18, 2019, 12:39:34 AM
Merited by frodocooper (5), judypug1956 (4), OgNasty (2), BitMaxz (1), Steamtyme (1), TheYankeesWin! (1)
 #1

So, just an FYI.... happened to me today, and a friend last week.

Woke up to learn my S17 56th went offline at 5am. Kernel log indicated it shut down because there was more than 0.5 volt difference between hash boards.

I rebooted.   Nothing.
I rebooted.   Nothing.

Went downstairs and pulled the plug.  Let it sit 5min and plugged it back in.  Vroom....back in gear.

Was up and running and then I got distracted by my time machine (xbox).

A few hours later, I check my pool and notice I'm running about 20-25th lower than normal.

Yep, the S17 56th is running about 2/3's normal hash.
Log in, 3rd board not detected. Reboot, nothing. Same. Only picking up 2 boards.

I popped the top off the miner. I found the same thing happened to me that happened to my friend. The rear buss bar wasn't fully seated into the 3rd hash board. It was at the slightest of angles, fully seated into the 1st board, but maybe 1/4" raised out of the clip in the 3rd board.  Pressed back into place and we are up and running like normal again.

Hopefully sharing this information may help someone in the future.


Pop the cover off the top of the PSU. Look in and you can see two bars running left to right, clipping into the clip atop the hash boards. The rear one likes to wiggle up and out. I'm guessing due to constant vibration of fans running.

So if you're only getting power to 2 of the 3 boards, check this before shipping it out for service.

Home garage miner:  (5) S17+ 73th
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lightfoot
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December 19, 2019, 02:21:28 AM
 #2

Pictures of this would be interesting. Any evidence of overheating on the power bus bars?
PopoJeff
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December 19, 2019, 02:25:40 AM
 #3

Well. I cant post pics here cuz I dont have an online pic hosting acct.

No. Bar looking fine.

Home garage miner:  (5) S17+ 73th
lightfoot
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December 19, 2019, 02:52:01 AM
Last edit: December 19, 2019, 10:52:25 AM by frodocooper
 #4

Darn. I'd be happy to post em on imgur and link here for you. PM me an email addy if you would like and thanks for posting this.
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December 19, 2019, 12:07:45 PM
Last edit: December 20, 2019, 01:59:40 AM by frodocooper
 #5

Pm sent.

Home garage miner:  (5) S17+ 73th
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December 20, 2019, 02:40:44 AM
Last edit: December 20, 2019, 11:21:07 AM by frodocooper
Merited by frodocooper (3), PopoJeff (3)
 #6

Up and credited. Thanks!

https://imgur.com/gallery/ZWt9ljg
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December 20, 2019, 03:49:32 AM
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Thanks for the assist

Home garage miner:  (5) S17+ 73th
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