As mentioned by wndsnb, they are interchangeable, but according to Zeusbtc you want to avoid using more than 4-5 of different chips on the same hash board, so if you can't find 1397AD for your S17 pro, you can get the AH,AI or AG version, but having more than 4-5 of them alongside the AD's will create issues and the hashboard might not function properly.

The hashboard is showing 63 asics which is a good sign, this could be a frequency/voltage issue, I believe if you run it on custom firmware like Vnish and let it auto-tune a low profile like the 12.5th that board might just come back to life.

Please don't try to disable the temp-sensor by any means, it's a very risky thing to do.

A few months ago, these miners were kind of cheap, most weren't really worth fixing, for example, S9 was sold for under $50, which means each hash board was worth about $15 when you include PSU and control board in your math, today that same $15 hash board costs $300 to get, it makes a lot more sense to repair it, even for say 50-100$.

The sudden surge in prices created high demand on repair service, this wouldn't be the case if bitcoin price was still trading under 10k, also I think many people understand this demand is temporary so expanding or starting a new repair business might not be very smart and thus the supply of these services remains constant to a certain degree.

There are is usually no physical damage that can be seen, the T17 miners have a very high failure rate, mainly due to the bad soldering of chips, the chip will usually NOT fall but the contact becomes too weak.

With that said, if you are consistently getting different results, I would flash the stock firmware (avoid the latest one) and test 1 board at a time, this could be a power-related issue, we can't tell for sure especially while running the miner with such firmware.

And why on earth would you do that?


Anyways, the kernel log shows that your chain 1 (the middle hash board) is dead, it could cause the miner to go into a loop of reboot, get rid of the firmware, and see if you see any different results which is unlikely, to be honest, and then just unplug chain 1 and mine with 0 and 2.

Of course, this assumes that you did the basic physical inspections like checking the screws on the busbar and replacing the ribbon cable.

I find it hard to understand this part, it could be your explanation or I am just getting old, but my best guess is that all hash boards work fine as long as you only run 1 hash board!

If the above is correct, then your issue is most likely a bad PSU or low AC input voltage.

The above gear is Whatsminer M21s 54TH, it has been mining since Oct 2019 nonstop, never been cleaned or looked after, it was put under extreme conditions of outside temperature as high as 45c, recently and for the past 30-40 days the rear fan died and the miner did NOT stop hashing, yes, it did not (not sure why MicroBT firmware does not care about 1 out of 2 fans going down).

The backside of the miner was almost boiling, it was too hot to touch, we literally had to let it sit there for a few mins before we could hold it, no Bitmain gear would endure that much except for the old and gold S9s.


As you can see in the image some of the heatsinks were literally blocked, but with zero problems, even by the look of it and without having to be an expert you can see that these gears are more robust than Bitmain's by a huge shot.

Surfing the Chinese market, you get to find a ton of used Bitmain gears but it's very hard to get your hands on Whatsminer, looks like the Chinese have figured this much already long, long time ago.

Comparing the M21s to the 17 series of Bitmain, the winner is obvious, I am pretty sure if an S17 was as dusty and ran with only 50% of its fans, it would have died in no time.

To easily calculate your chances use this website > http://solochance.com/.


This is the last block solved on CKsolo


The miner was lucky to solve a block with 77.7th being his 7d average, of course, we don't know for how long it was, but he most certainly earned more than we could ever earn mining on a pool.

But not everyone is lucky enough, solo mining should be done for fun (I do it for fun on Cksolo), but your main hash power should be pointed towards a pool if you want to make some profit.

I know the question is pointed to phill but I think many of us who dislike POS share some basic ground, my main issue with POS coins is the convenience of centralization, we have to agree that almost everything can be centralized if enough money is thrown at it, but it all boils down to "how easy" you can achieve that.

If we take bitcoin current hashrate and see how someone who is super rich and wants to have control over it, it's not feasible, it is going to take more than just money to acquire say 50% of the hashrate, and most importantly, you can't do it without everyone and their grandmother knows about it, as it stands right now, it's not even possible to control 10% of the hashrate without the whole world knowing who you are.

in POS, the level of convenience towards centralization is mainly based on the market cap of that coin, someone who has enough money can take control over the coin in a few seconds, POS as the name suggests is pure proof of wealth, the more money you have the more control you have, while this is partially true for POW coins too, as explained above it's a lot less convenient to attack or control POW coins.

Another issue with POS is that you can be on multiple blockchains, this creates a major consensus problem which POW solves by default because to be on one chain you need the power and the gears for that, to be on another you need 'different' power and gears.

The last major issue is the acquisition of the "power", if someone has 50% of the supply and refuses to sell, the community can't compete against them since coins can't be created out of thin air, and the fresh supply won't change the percentage, on POW, however, it's extremely difficult for a single entity to own half of the hashrate, and even if that was the case, the ability to take back the power from them is there.

With that being said, POS does have some advantages over POW, I believe both protocols serve different purposes.

Another member(he can reveal himself if he wants to) and I were contacted by a Chinese manufacturer who did something almost identical to what you are trying to archive, they made their own hash boards which were more efficient than the regular S9 hash boards, and their own firmware which you had to deploy on the default controller of the S9 (the hash boards won't work with the default firmware).

The company wanted economical consultation in terms of pricing, I contacted a few major resellers in China, Russia, and the U.S, and sadly the final sale price was not tempting enough to convince anyone to get those hash boards, mind you the company that did this is located in china, and they paid us just for the consultation, they clearly had the money and the manpower needed for that job, and the results were not so great.

I am not aware of where did they go wrong or how difficult it was, but I am certain they had more skills, money, and resources than you do, which is one of the main reasons why I told you in my first comment that this "won't work", it wasn't a blind baseless statement, I hope the above information will be beneficial to you oneway or the other.

Good luck.

Nearly all shapes and forms of civilization have a negative environmental impact, based on that logic we should just get rid of everything around us and live like our ancestors, it's either that or we stop cherry-picking shit.

If we ignore the environmental drama and focus on the economy, in a place where capitalism rules everything, mining bitcoin is a great addition to any economy, It creates jobs
and incentives us to find cheaper methods to generate power.

Buy first and then do your research, way to go, my friend.


Try to keep them cool that will help.


some folks reported some tiny percentage of success by placing them horizontally, I'd say it's a fraction of an effect but well, why not? just make sure you place the chips up, the larger heatsink needs to face up.

I don't why but I think you are under the impression that I am trying to make you change your mind as if I own a huge chunk of the mining industry, it is actually the exact opposite, I am a buyer I would most certainly love to see the likes of your idea get implemented so I can buy cheaper gears.

But I know for a fact that it won't make any economical sense, ignore the little details and just look at the big picture, you are trying to compete with multi-billion dollar companies, if Bitmain, MicroBT, Canaan or Inno had a way of making an S19 equivalent for less than the market price they would have done just that, they won't leave this money making opportunity to the average joe.

This means there are some hidden and unknown costs that you don't seem to be aware of (I am not aware of them either), you seem to be simplifying the matter way too much, this is either overconfidence or pure misunderstanding of how things are.
 
You claim that you can make a mining gear that goes for 14k for just under 6k + the PCB cost, then my words hold no meaning at all, go ahead and do it, meanwhile, you might want to test on a cheaper gear like the S17 or S9 given that the success rate of this operation isn't too high.

Good luck

Running miners on UPS is a recipe for a loss, the average miner nowadays consumes 2.5-3kw, so he will need at least something that can deliver 4kw, which will be very, very expensive.

OP, you don't need to do anything the miners will reconnect automatically, although, I am not sure about running mining gears on a generator, what gears and how many are you going to be running? and what is the rated power of your electricity generator?

I read every single bit of it, twice, and I have no changed my mind, this will NOT work out as far as the economy is concerned.


This does not make sense, there is chip shortage and high demand, your "someone" can sell the chips for a large profit if they are indeed getting them near or at cost price, so no, nobody is going to give you cheap chips, and then even if that was the case, you are better of reselling the chips for a premium than trying to reinvent the wheel.


That is not a fact, it's an assumption, there is a technology edge you seem to miss here, just by accruing the parts needed to make something does not mean you can "assemble" it cheaper than the manufacturer if this was the case, everyone would be making their own cars, TVs, phones and whatnot, your theory is only partially valid if you had nothing else to do, in other words, your time is worthless and thus there is no loss of opportunity cost.



I highly doubt that, they just don't know the latest prices and don't even bother asking their sources, try to make an order and you will be hit by the real prices, but then really the exact number does not matter, the price will be a reflection of the whole market, and the important part is that the total cost of the gear you are going to assemble is not going to be lower than the market price, be it $20 per chip of 20 chips for $1.


This does not make sense, if the profit margin is as HUGE as you think, then nobody would have enough resources to run all those gears, someone would have made tens of thousands of them and fully utilized every bit of power they have and will eventually have to start selling, also there are no-name gears coming online, we are watching the hashrate very closely, everything points to a massive shortage in gear making across all the major manufacturers, I hate to break it to you but, NO, nobody is assembling S19s for a fraction of they go for.



And I did not disagree with this, my whole point was economical, I know the technical part will be workable somehow, everyone can manufacturer almost everything, it all boils down to the cost and quality of the end product, there is no way on planet earth that a single person like you or I can beat the market, do you have the slightest clue how long it is going to take you to solder 342 chips which is probably the easiest part of your experiment?

I don't want to sound rude, but it's funny that you think you found a glitch in the game or a money printing machine which ONLY you know about, it's crazy because it sounds just like perpetual motion.

With that being said, if this is to be done for the sole purpose of learning or having fun, I'd go for it, but if you think you will assemble a miner at a reasonably lower price than the current markets, well, good luck.

Your pool didn't find a block for the past 60 days, with 1.5% fees on FPPS there must be a ton of reserves for the pool not to go broke, I honestly doubt this is going to work with your business model, have you been giving daily payouts for the past 60 days? also, how long can you move forward without hitting a block before closing, I do understand that it's a maximum risk of 24 hours of hashrate or so lost, but if I decide to use your pool I want some assurance that you are not going to shut-down.

That's far from accurate, the  BM1398BB chips which are used on the S19 cost over $20 (ignore prices on Alibaba/Aliexpress because those are either scammer or failed to update the price list).

So for an S19 pro you going to need 114*3*20 = $8,640 in Chips alone, you might find them a bit cheaper, but nothing remotely close to the 2$ mark.


I disagree, and I am certain that it will cost you above $10k, you are trying to beat bitmain into making a "cheaper" gear is daydreaming at best, honestly, I think any rational thoughts should be based on the fact that ALL markets on planet earth eventually get to an equilibrium, whereby the "arbitrage" profit becomes too small.

So with that in mind, you have to keep in mind that there are a dozen of businesses there, including some Chinese BILLIONAIRES who have access to more resources than you do, they have hundreds if not thousands of staff and robots, if "cloning" an S19 pro today costs less than 10k, everyone and their grandmother in China would be doing that, the S19 pro sells for 14-15k in China, and it's selling HOT.

That 14-15k isn't a random number that Chines sellers decide over their wechat chat-room, it's a perfect mix of supply and demand, NOBODY was able to increase the supply and that's why the price hasn't dropped if what you think is true, the markets would be flooded with a no-name 110TH miners or so, but why aren't there any? unless you think you know things that nobody else does, which is unlikely.

I really admire your ambition, but what you are trying to do is worse than reinventing the wheel.

Go to Zuesbtc.com to find their WhatsApp number and send them a message there, they will likely guide you on how to restore the fixture tool, but I don't think the board needs flashing as it doesn't even boot from the NAND with the sdcard in place the and jumpers are changed (which you need to check as well).

There are some tools out there, this looks neat > https://bitcointalk.org/index.php?topic=5257764.20

Or, use AwoseomeMiner, it has a scheduling function and you can do just about anything with it, with that said, if your miners are SSH locked then it will be a bit hard to do, you may end up using custom firmware.

The temp part has to do with the heatsink contact, finding less than the total Asics has to do with the terrible quality of the solder paste Bitmain uses, it's a very common issue with all the 17 series, the E version is the worst of all be it the T or the S type, the hash board is probably dead and needs repair.