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One 1041 and one 1047 with a dead PSU left. I'll check, but I think the PSUs are identical between the two so I could move the working PSU over to the 1047.
With the recent increase in profitability, I'm now looking to get $500 for the miner with working PSU. Still a good deal I think. At current price and difficulty, 5 cent power would ROI in about 3 months or about 4 months with 7 cent power.
Shoot me a PM if interested.
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I've ordered from Zeusbtc with shipping to the USA. They were responsive and shipped out quickly. Just contact them via Whatsapp. Shipping prices can be pretty expensive.
The heatsinks are originally attached using solder, but removing and reattaching these with solder is pretty difficult. Getting the correct amount of solder is difficult, and you need to be very careful or you could end up shifting the chip beneath the heatsink. It takes a lot of practice to be able to do it reliably. I wouldn't advise attempting it unless you have the tools to diagnose issues after (test fixture, oscilloscope, multimeter...etc).
If you go the glue route, you're probably better off finding some arctic silver locally. Or some other thermally conductive epoxy.
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Yeah 80 is fine. Mine run in the 60s and 70s for max temp in the winter, 70s and 80s in the summer. It's probably a good idea to give them a cleaning though, just take both front and rear fan plates off and hit it with a vacuum and compressed air if you have it. After months or years of running tons of air through at fairly high speed, they collect garbage, and since the temperature of every chip isn't monitored you can run into issues eventually. I've been repairing miners for my host, and so far all the ones I've looked at have had some level of blocked heatsinks. Mostly dead insects.  |
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They tend to have pretty large temperature differences. 2 of the temperature sensors on each board are near the air intake, and 2 are near the exhaust. The ones near the exhaust run hotter since the chips between them and the air intake heat up the air. Most of mine are in the 10 to 15 deg difference, so your miner has a bit more swing than normal I think. The hashboard heatsinks might need to be cleaned out, they tend to collect dead bugs and lint that gets sucked in through the air intake and clog up the heatsinks.
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First two miners are finding 0 chips on one hashboard at startup. Not something that is generally fixable without getting the hashboard on a test fixture and tracking down the issue. As mikeywith said, your best option is probably to try to just run with 2 hashboards each. If you can find a repair shop reasonably close you could consider sending them to get repaired, but by the time you pay shipping both ways and repair of 2 hashboards it would probably be > $500. Sending them back to Bitmain is not a good option in my opinion. I RMAed a S17pro under warranty to Bitmain's repair facility in California in May and still don't have it back.
As for the 3rd one, it doesn't see any chips on bootup from any hashboard. Not likely that all 3 hashboards decided to die at the same time. So, like mikeywith suggested, you should see if your host will swap a PSU to see if it runs with a good one. If that doesn't do it, you might see if they'll swap the control board out.
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2020-12-20 03:49:15 driver-btm-api.c:1134:check_asic_number_with_power_on: Chain[1]: find 50 asic, times 0
2020-12-20 03:49:26 driver-btm-api.c:1134:check_asic_number_with_power_on: Chain[1]: find 50 asic, times 1
2020-12-20 03:49:37 driver-btm-api.c:1134:check_asic_number_with_power_on: Chain[1]: find 50 asic, times 2
2020-12-20 03:49:37 power_api.c:380:modify_check_asic_voltage: check_asic_voltage_raw = 2100
[...]
2020-12-20 03:55:20 thread.c:1273:asic_status_monitor_thread: ERROR: chain 0 get hashrate_reg_counter 55, require 65, failed times 1: ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo xxxxx xxxxx
2020-12-20 03:55:21 thread.c:1293:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 0 times.
2020-12-20 03:55:22 thread.c:1273:asic_status_monitor_thread: ERROR: chain 0 get hashrate_reg_counter 55, require 65, failed times 1: ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo xxxxx xxxxx
2020-12-20 03:55:23 thread.c:1293:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 1 times.
2020-12-20 03:55:24 thread.c:1273:asic_status_monitor_thread: ERROR: chain 0 get hashrate_reg_counter 55, require 65, failed times 1: ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo xxxxx xxxxx
2020-12-20 03:55:25 thread.c:1293:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 2 times.
2020-12-20 03:55:26 thread.c:1273:asic_status_monitor_thread: ERROR: chain 0 get hashrate_reg_counter 55, require 65, failed times 1: ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo xxxxx xxxxx
2020-12-20 03:55:26 register.c:160:read_asic_reg_with_addr: read asic reg error: expect chain = 2, chip = 150, reg = 28, got chain = 0, chip = 0, reg = 1
2020-12-20 03:55:27 register.c:313:get_register: !!! REG_TYPE = 1. 704673792
2020-12-20 03:55:27 thread.c:1293:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 3 times.
2020-12-20 03:55:28 thread.c:1273:asic_status_monitor_thread: ERROR: chain 0 get hashrate_reg_counter 56, require 65, failed times 1: ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo ooooo xxxox xxxxx
2020-12-20 03:55:29 thread.c:1293:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 4 times.
2020-12-20 03:55:29 thread.c:1297:asic_status_monitor_thread: chain 0 can't get enough hashrate reg val for 5 times, power off.
2020-12-20 03:55:30 temperature.c:843:get_temp_info: read temp sensor failed: chain = 0, sensor = 3, chip = 50, reg = 1
Looks like chain 1 is not able to get status back from chip 51 - 65, which could there is an issue with asic chip 50 or 51, or an issue with the voltage regulation for 51 - 55. Could be bad solder joints, excess solder from the heatsink shorting signals out, or just a bad chip. Essentially the same for chain 0, but it manages to get the status back initially but then fails once the board starts hashing. That can happen because solder connections break or short when the board heats up or the voltage regulation dies once the board starts drawing more current. I don't think you can hurt anything by swapping hashboards around, although some 17 series hashboards don't mix with others, so it may not work. My understanding is that the control board needs all the hashboards to be running the same firmware. Did these machines arrive like this? If so, is coinminingcentral not being helpful? If you've read through this thread then you know sending a miner to Bitmain for repair is not a good idea, so definitely try to find a 3rd party to repair them. If you send it to Bitmain you might never see it again. So in my opinion, best option is to get coinminingcentral to make good in some way, second best option is to find a repair shop. |
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Still available... Feel free to send me an offer.
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A good start would be to post the kernel logs.
Are they not hashing at all, or hashing and then shutting down after a period of time?
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3 1047s (one with a dead PSU) and a 1041 still available.
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Unless your government offers incentives that will cover 75% of the cost of the system, it doesn't make sense to use solar for mining, at least profitability wise. But depending on where you live, it is possible to get the taxpayer to buy a lot of your system for you. Can't hurt to check it out.
Get some quotes, they will generally give you a report of total cost, tax incentives, and how long it will take to pay the system off with your power usage. I did this a few years ago. For where I live, it would have taken around 6 years to pay back the cost of the system if I laid out cash to buy it. What I got quoted worked out to paying around 10c/kwh if the system never broke and lasted for 25 years. That was after all the tax breaks.
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I'd really like to get an up-close look at the guts of one of these. Looks like they have one heat exchanger per hashboard instead of individually mounted heatsinks on each asic. That should make reliability an order of magnitude higher than the air-cooled ones. I think repairing them gets way easier too. >50% of replacing an asic on a 17 series miner is messing with those damn heatsinks.
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Found the post where phil recommends a repair place. Not sure if those prices are up to date, the web site currently says $150/$250 for basic/advanced repair. I'm in NC. Can I send you my PSUs to test? Or can you send me a working one and I'll pay for shipping?
We have a repair guy we use that is located in NC. Give me 5 minutes to find the link. He has been a godsend with psu replacement. I used https://hmtech.co/ (919) 283-2715 they do repair m20s they sold me a m20s psu a p21 they also have bitmain parts and repairs. Tell them philipma1957 of bitcointalk linked you. I get zero money for this. But I like that they know I send them people. He has to be close to you as it is the same state. He has helped 4 or 5 of us with psu replacements. yeah they seem to have really dropped in their service . I won't be using them to get a m30s. I used https://hmtech.co/ (919) 283-2715 they do repair m20s they sold me a m20s psu a p21 ASIC Repair : Basic / Advanced
Bitmain
$300 / $400
S17 & T17
Whatsminer
$300 / $400
M20s & M21S
Innosilicon
$300 / $400
T3 series
ASIC PSU's
Innosilicon T3 series PSU
$200
New
Whatspower P21 PSU
$200
New
Innosilicon T2 double fan series & T3 PSU
$200
New
good luck. |
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Keep in mind that you can probably find a host to run your miners for around 7c/Kwh all in the US or Canada, less if you're willing to use one in Russia or China. Lots of large operations are out there mining at less than 4c/Kwh, and that makes it risky to be paying 7c, really risky to pay >10c. Chances of making back your investment in the hardware back go down dramatically. So with your power rates, I'd maybe find a S17/S17pro to run yourself if you want to tinker, but send any others off to a host. With the recent prices, hosts may start filling up to capacity pretty quickly though. I like the idea of holding what you mine ... that's exactly what I've been doing nearly since I started. The only BTC I've parted with was to directly buy more miners, and I regret every time I've done that. Should have just used $. Thought I would need to start selling some to pay my hosting fees after expanding this early year, but ended up not doing that, and now the BTC I mined at 8K is worth 19K... Of course it could have gone the other way, but if your not long-term bullish on BTC, probably shouldn't bother mining anyway. Another thing to keep in mind is that the 17 series from Bitmain have had manufacturing issues that have caused some people to claim that up to 20% of the miners they got failed within the warranty period, which is awful buy itself, but then the repair centers got backed up and now with COVID they are all but completely shut down. I've been waiting over 4 months for a S17pro I RMAed to the CA repair site. Don't know if people have had 19 series long enough to know if the manufacturing issues have been fixed. See this thread for more info. |
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[...]
Wow ... so they want to keep your property and won't even compensate you in real $, but 10% max coupons instead! Unreal. The things people/companies/governments are doing using the COVID excuse are just awful. |
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Well ... Can't argue with results but I doubt it will be a very permanent fix. I'm also curious if it is still running.
My only guess would be that the issue was a bad solder joint and the thermal cycle expansion/contraction moved the bad connection enough to make contact. Or maybe the residual flux that may be keeping some stray solder balls in place that leaked out during heatsink application gets brittle enough to flake off when cold.
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Are you located in the US and are you willing to use forum escrow?
Located in Massachusetts and yes on forum escrow. |
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Looking to sell 4 1047s and 1 1041. One of the 1047s has a dead PSU. I tested it with one of the working PSUs and it runs fine. They were running for about 6 months at a hosting facility. Looking for $1750 + shipping + escrow for the lot.update: one sold, now looking for $425 + shipping + escrow for each of the 1047s and 1041 with working PSUs, $225 + + for the 1047 with the dead PSU.
Or $1275 + shipping + escrow for the rest.Three 1047s sold, now looking for $500 + shipping + escrow for the 1047 or 1041 with working PSU.  |
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