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Author Topic: Antminer l3+ hashboard problem.... burned?  (Read 570 times)
complexiflow (OP)
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September 27, 2017, 10:13:07 AM
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Hi everybody,

I have a problem with a l3+. This morning I noticed that one of the heatsinks came off the board, and that this board is not working anymore. I suspect that the chip burned, however, it does not look like it is burned. (no smell, and the chip looks fine). Does anybody has experience with this? Suggestions how to solve this?

Thanks in advance!
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bathrobehero
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September 27, 2017, 02:09:08 PM
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If it doesn't have some sort of a failsafe that shuts down the board/chip in case the temp reached critical levels, it's likely died. It doesn't have to let the smoke out to die.

Not your keys, not your coins!
complexiflow (OP)
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September 28, 2017, 10:42:05 AM
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Also with the temperature failsafe turned off it won't start.

So, let's assume the the chip reached critical temperature and is fried. Why the whole board is broken, instead of only that chip? The antminer interface suggest that individual chips can die, with the rest of the board still functioning. Is there a way to 'exclude that chip' and run the board without that chip? Are there any schematics available for this l3+ blades?

Any tips are welcome.

complexiflow (OP)
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September 28, 2017, 02:43:04 PM
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Oke, I'm a bit confused at the moment. This is what I did:

I took out the broken board and the miner was hashing with 3 boards. Since I wanted to exclude the possibility that it was the control board that was not working properly, I connected one of the working cards to the empty slot. The result was only 2 boards. This suggest that there is something wrong with the control board. However, I changed it back and still have only 2 boards. I have the feeling that every time I unplug a board, my control board does not see the board when I plug it back in... I don't believe that my hashboards are broken....

Is there anybody that can clarify this, has experience with fixing miners or has some tips?
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September 28, 2017, 08:48:54 PM
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Prob best is to ask Bitmain. Just don't tell them you already broke the seal on the fans  Wink
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September 28, 2017, 09:12:46 PM
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Just a point of clarification on your earlier question. Bitmain boards use a string design, like a set of christmas lights. When one chip dies and is no longer passing signal along its predetermined path, the whole board fails to run.

As far as the controller getting weird, the only thing you can really do is factory reset it or update the firmware in case something got corrupted.

Stop buying industrial miners, running them at home, and then complaining about the noise.
complexiflow (OP)
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September 29, 2017, 03:08:09 PM
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Would there be a way to exclude/bypass one of the chips? Since they are wired in serie this must be (at least in principle) be possible right? Furthermore, updated the firmware, but that didn't help.

Let's assume that the control board is broken.. Can it be the case that the control board damages a hash blade? I find this very unlikely. Any thoughts on this?

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