{"product_id":"antminer-s21-plus-hydro-hashboard-repair-service","title":"Antminer S21+ Hydro Hashboard Repair Service","description":"\u003cp\u003e\u003cstrong\u003eAn Antminer S21+ Hydro stops the whole machine — all three boards — over a fault that lives on one of them, and the line it prints doing it often names the wrong thing. A healthy S21+ Hydro board reports 95 chips, and any other number is a fault. Both are repaired at component level in the USA, 4-5 business days.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMost Antminer S21+ Hydro hashboard repair jobs that reach our USA-based lab arrive described as a cooling problem, and most of them are not one. The machine stops, the log says it is too hot, and the owner starts on the chiller, the pump and the coolant — while the machine was never hot in the first place. Which of the three boards stopped it is not something the dashboard will tell you, and it is not your job to work out: the miner comes in complete, goes onto our bench loop, and the board is found, repaired at component level and proved under load before the machine goes back.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Diagnostics and Common Issues with Antminer S21+ Hydro\u003c\/h2\u003e\n\n\u003ch3\u003eQuick Symptom Checklist\u003c\/h3\u003e\n\u003cp\u003eThese are lines this model prints on stock firmware, copied as the firmware writes them. Chain numbers, chip counts and temperature figures differ from machine to machine, so match the shape of the line rather than the digits. The machine counts its boards from zero, which makes \u003ccode\u003echain 2\u003c\/code\u003e the one you would call the third.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ccode\u003eERROR_TEMP_TOO_HIGH: over max temp\u003c\/code\u003e followed by \u003ccode\u003estop_mining: over max temp\u003c\/code\u003e — and on the line above it, readings of \u003ccode\u003e0\u003c\/code\u003e where the temperatures should be\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003egot abnormal water temp_max 65409\u003c\/code\u003e — a number that is not a water temperature at all, printed as if it were one\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003eSweep error string = P:1.\u003c\/code\u003e or \u003ccode\u003eJ0:6.\u003c\/code\u003e or \u003ccode\u003eV:1.\u003c\/code\u003e in the lines around a stop — the letter names the class of the stop, not the fault\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003eEEPROM error: CRC 1ST REGION\u003c\/code\u003e and \u003ccode\u003egot nothing\u003c\/code\u003e, ending in \u003ccode\u003eData load fail for chain 0.\u003c\/code\u003e — the controller could not read that board's stored identity\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003efail to read eeprom by iic, chain: 0, addr: 0\u003c\/code\u003e and \u003ccode\u003eiic write failed\u003c\/code\u003e — usually arriving in the same minute as the temperature nonsense above\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003eChain 0 only find 0 asic, will power off hash board 0\u003c\/code\u003e with \u003ccode\u003eERROR_ASIC_NUM: asic number is not right\u003c\/code\u003e — a board that came up short of its 95 chips\u003c\/li\u003e\n\u003cli\u003e\n\u003ccode\u003eERROR_SOC_INIT: basic init failed!\u003c\/code\u003e or a boot that ends on \u003ccode\u003esomething error when miner init, restart...\u003c\/code\u003e and loops there\u003c\/li\u003e\n\u003cli\u003eNot in the log at all: a machine that runs for an hour or two, drops out of the pool, comes back after a restart, and does it again\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eModel-Specific Patterns We See on Antminer S21+ Hydro\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAn overheat stop with no heat anywhere in it.\u003c\/strong\u003e The firmware announces \u003ccode\u003eERROR_TEMP_TOO_HIGH: over max temp\u003c\/code\u003e and shuts the machine down, and the line directly above it reads every temperature on that board as \u003ccode\u003e0\u003c\/code\u003e against ceilings of 85 and 95 °C. Nothing was hot. What the machine is saying is that the figures it was given are not figures it can run on, so it stopped rather than guess. It is not a verdict on your cooling, and this is the pattern that costs owners the most time, because the message names the one thing that is not wrong.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA water temperature that cannot exist.\u003c\/strong\u003e \u003ccode\u003egot abnormal water temp_max 65409\u003c\/code\u003e is the same story wearing a different face — a figure so far outside anything physical that the firmware flags it as abnormal, then stops the machine a moment later anyway. A real coolant problem moves gradually and moves both ends of the loop together. A number like that one came from the board, not from the water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOne board's fault takes all three down.\u003c\/strong\u003e Stock firmware on this model does not run the machine short. A fault confined to a single board does not cost you a third of your rate, it costs you the lot, with two healthy boards sitting idle beside the one that stopped. That is why an S21+ Hydro that has been down for a fortnight is usually a one-board job, and why the arithmetic of repairing it against replacing the machine is not close.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSeveral different faults print the same way.\u003c\/strong\u003e An i2c line, a chain that finds none of its 95 chips, and a failure to read the board's stored identity often arrive in the same part of the log, and owners read them as one catastrophic event. They are neither one fault nor one cause. There are many ways to end up at those lines, the log separates none of them, and which one it is on your board is bench work — found with the board warm and running under coolant, not read off a screen.\u003c\/p\u003e\n\n\u003ch3\u003eHardware Notes\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;font-family:sans-serif;font-size:14px;margin:16px 0 24px;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:32%\"\u003e\n\u003ccol style=\"width:68%\"\u003e\n\u003c\/colgroup\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color:rgb(248,248,248);border-bottom:2px solid rgb(238,238,238);\"\u003e\n\u003cth style=\"padding:12px;text-align:left;vertical-align:top;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;vertical-align:top;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eAlgorithm and cooling\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eSHA-256. Liquid-cooled, with no fans anywhere in the machine: each board carries its own cold plate and the three plates share one coolant loop. Bitmain writes the model as S21+ Hyd., and so does the firmware — \u003ccode style=\"word-break:break-all;\"\u003eupdated miner type to: Antminer S21+ Hyd.\u003c\/code\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eMiner hashrate\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e355 TH\/s at roughly 5360 W for the bin the repair documentation describes; the same machine is sold in several bins between 319 and 395 TH\/s. One board out is a third of whatever your unit is rated at, and stock firmware does not run the machine on the other two.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eHashboards per miner\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e3. The log and the interface call them \u003ccode style=\"word-break:break-all;\"\u003echain 0\u003c\/code\u003e, \u003ccode style=\"word-break:break-all;\"\u003echain 1\u003c\/code\u003e and \u003ccode style=\"word-break:break-all;\"\u003echain 2\u003c\/code\u003e, and the boot line that names all three at once is \u003ccode style=\"word-break:break-all;\"\u003echain_num 3\u003c\/code\u003e.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eChips per board\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e95, so 285 in the machine. The healthy line is \u003ccode style=\"word-break:break-all;\"\u003echain_asic_num 95\u003c\/code\u003e, and a good boot prints it three times as \u003ccode style=\"word-break:break-all;\"\u003eChain[0]: find 95 asic\u003c\/code\u003e and the same for chains 1 and 2. Any other number on a board is a fault, whether it is 94 or 0. More on what the count means is on our page about \u003ca href=\"https:\/\/antminer-repair.com\/pages\/asic-count-on-the-hash-board\"\u003eASIC count on the hashboard\u003c\/a\u003e.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eHow the chips are grouped\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e19 groups of 5, which the firmware states as \u003ccode style=\"word-break:break-all;\"\u003echain_domain_num 19\u003c\/code\u003e and \u003ccode style=\"word-break:break-all;\"\u003edomain_asic_num 5\u003c\/code\u003e. Domain is the firmware's own word for a group, and it is the word to look for in your log.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eChip family\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\n\u003ccode style=\"word-break:break-all;\"\u003eBM1370\u003c\/code\u003e, the same family used across the 21 series in several letter-suffixed versions. The suffix is not documented by anyone, and the working rule is to match the marking already on the board rather than to reason from the model name.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eHashboard part number\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eThe interface header shows it as \u003ccode style=\"word-break:break-all;\"\u003eAntminer H6HB70701\u003c\/code\u003e, and the boot log prints the configuration it loaded for it — \u003ccode style=\"word-break:break-all;\"\u003eload machine H6HB70704 conf\u003c\/code\u003e. Those two strings differ on a perfectly normal machine and both belong to the same board; a build stamped 70701, 70702 or 70704 is the same hashboard. \u003ccode style=\"word-break:break-all;\"\u003eH6\u003c\/code\u003e at the front is Bitmain's mark for a liquid-cooled 21-series board, and it is what separates this board from the air-cooled S21+, whose number ends in the same digits behind a different prefix.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eFirmware stop limits\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eThe log prints its own ceilings beside every reading: \u003ccode style=\"word-break:break-all;\"\u003e(max 85)\u003c\/code\u003e for the board and \u003ccode style=\"word-break:break-all;\"\u003e(max 95)\u003c\/code\u003e for the chips. It is worth reading those two figures next to the numbers in front of them, because that is where a stop with zeros in it gives itself away.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003ePower supply\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eAPW111721 series. On a healthy boot the log identifies it and calibrates it; when the controller cannot get an answer it prints \u003ccode style=\"word-break:break-all;\"\u003eget power version failed\u003c\/code\u003e and retries on an older protocol, and on its own that line is not a verdict on anything.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat the Log Is Telling You\u003c\/h3\u003e\n\u003cp\u003eNone of this asks anything of you. It is here so you know what state your machine is in before you decide to ship it.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;font-family:sans-serif;font-size:14px;margin:16px 0 24px;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:34%\"\u003e\n\u003ccol style=\"width:33%\"\u003e\n\u003ccol style=\"width:33%\"\u003e\n\u003c\/colgroup\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color:rgb(248,248,248);border-bottom:2px solid rgb(238,238,238);\"\u003e\n\u003cth style=\"padding:12px;text-align:left;vertical-align:top;\"\u003eWhat you see\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;vertical-align:top;\"\u003eWhat it usually means\u003c\/th\u003e\n\u003cth style=\"padding:12px;text-align:left;vertical-align:top;\"\u003eWhat we do with it\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\n\u003ccode style=\"word-break:break-all;\"\u003eERROR_TEMP_TOO_HIGH: over max temp\u003c\/code\u003e with zeros in the readings on the line above\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eNot a heat problem. The machine was given figures it could not run on and stopped rather than guess.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eWe read the numbers against the ceilings printed beside them, then work the board warm and under coolant. A stop shaped like this points at the board, and we tell you so before you spend anything on the loop.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\u003ccode style=\"word-break:break-all;\"\u003egot abnormal water temp_max 65409\u003c\/code\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eA figure that no coolant loop can produce. Real cooling faults move gradually and move both ends of the loop together.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eWe treat it as coming from the board rather than from the water, and prove that on the bench under coolant instead of replacing cooling hardware to find out.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\n\u003ccode style=\"word-break:break-all;\"\u003eEEPROM error: CRC 1ST REGION\u003c\/code\u003e, \u003ccode style=\"word-break:break-all;\"\u003egot nothing\u003c\/code\u003e, \u003ccode style=\"word-break:break-all;\"\u003eData load fail for chain 0.\u003c\/code\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eThe controller could not read that board's stored identity, so it has nothing to configure the chain from. Several unrelated faults end here.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eWe establish which of them it is on your board, repair it, and confirm the board is read correctly on a cold start and again warm.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\n\u003ccode style=\"word-break:break-all;\"\u003eChain 0 only find 0 asic, will power off hash board 0\u003c\/code\u003e and \u003ccode style=\"word-break:break-all;\"\u003eERROR_ASIC_NUM: asic number is not right\u003c\/code\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eThat board reported fewer than 95 chips, so the firmware shut it down. Zero and a count a few short are the same class of fault, not different severities.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eWe bring the chain up on the bench under coolant and find the point where the count breaks, then repair at component level and read the full 95 back.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid rgb(238,238,238);\"\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003e\n\u003ccode style=\"word-break:break-all;\"\u003eSweep error string = P:1.\u003c\/code\u003e, \u003ccode style=\"word-break:break-all;\"\u003eJ0:6.\u003c\/code\u003e or \u003ccode style=\"word-break:break-all;\"\u003eV:1.\u003c\/code\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eAn index, not a diagnosis. The letter names a class of stop, and the lines around it say what actually happened.\u003c\/td\u003e\n\u003ctd style=\"padding:12px;vertical-align:top;word-break:break-word;\"\u003eWe use the letter to find the right part of the log and then read the log, because on this model the same letter arrives for faults with quite different cures.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eDiagnostics Focus\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBelieve the count, question the temperature.\u003c\/strong\u003e On this board the chip count is a reliable witness and a temperature reading is not: 95 or a fault, with nothing in between to interpret. A temperature, by contrast, can be missing, frozen or impossible while the machine is stone cold. So the order of work is the opposite of what the log suggests — the readings are established as real or not real first, and only a board producing honest readings is judged on what those readings say.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarm, wet and for long enough.\u003c\/strong\u003e A board that passes cold proves very little here. The faults that bring these machines in are the intermittent kind: a chain that holds 95 chips at boot and loses them once the machine is hot, a stop that only arrives after twenty minutes under load. Every measurement is taken with coolant flowing and the board at working temperature, and a repaired board goes back only after it has held its count and its readings under real load.\u003c\/p\u003e\n\n\u003ch2\u003eOur Professional Repair Process\u003c\/h2\u003e\n\n\u003ch3\u003eGotchas\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe coolant comes out before it ships, and the ports go back on.\u003c\/strong\u003e A machine that travels with liquid still in it usually arrives with some of that liquid somewhere it should not be, and a board that has been wet and then powered is scrap rather than a repair. Drain it, cap the inlet and the outlet, and it travels without incident. This is the one thing we ask of you before the machine leaves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe cold plate is bolted down, not soldered — which is the whole reason this board is repairable.\u003c\/strong\u003e Owners are told a hydro board is a sealed unit to be replaced rather than fixed, and it is not: the plate comes off, the chips underneath are reachable, and the board goes back together. What it does mean is that the compound under that plate is renewed every single time it is opened. A plate put back onto its old compound runs hotter afterwards than it did before, which is how a board can reach us in worse condition than it was in when somebody else opened it.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Service Scenario\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMonths spent on a cooling loop that was never at fault.\u003c\/strong\u003e The machine stops on temperature, so the owner works through the obvious list — flushes the loop, changes the coolant, checks the pump, eventually replaces cooling hardware — and the stops keep coming back at the same interval. The fault was never in the water, and everything that was done to the loop was done to a healthy loop.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA hosted machine handed back.\u003c\/strong\u003e These units run in hosted halls on three-phase power, and when one drops off the floor the site pulls it and returns it to its owner, who now has a 355 TH\/s machine that will not start and no local service option. The factory route for a liquid-cooled Antminer is measured in weeks or months, in both directions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAn opened machine that got worse.\u003c\/strong\u003e Somebody lifted a cold plate to look, put it back on what was already there, and the machine came back with temperatures higher than before and a new stop pattern. That is a repairable board that has been made harder to repair, not a ruined one.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Happens After Intake\u003c\/h3\u003e\n\u003cp\u003eThe machine comes onto our bench loop whole: intake, incoming inspection of the coolant path and of all three boards, then diagnostics with the boards running under coolant rather than dry. Component-level repair follows, then cleaning and a freshly printed thermal interface under every plate that was lifted. Board-level validation runs on our STASIC and ASIC REPAIR fixtures, and the machine then runs under load for a minimum of one hour before it goes back. Extended burn-in beyond that hour is a separate add-on.\u003c\/p\u003e\n\n\u003ch3\u003eDiagnostics and Validation Equipment\u003c\/h3\u003e\n\u003cp\u003eOur ASIC REPAIR and STASIC fixtures read the board's chip inventory back the way the miner does, so a pass on this model means the fixture found all 95 chips and the board came through its checks clean — not merely that nothing obvious was wrong. The verdict that counts is still the machine's own: the repaired board back in its slot, in the loop, holding its count and its share of the rate under load for at least an hour.\u003c\/p\u003e\n\u003cfigure style=\"margin:20px 0 26px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0788\/4917\/9921\/files\/antminer-s21-plus-hydro-hashboard-asic-repair-tester-pass-95-chips.webp?v=1789446779\" alt=\"ASIC REPAIR tester result for an Antminer S21+ Hydro hashboard: 95 chips found, test passed\" loading=\"lazy\" width=\"1916\" height=\"784\" style=\"max-width:100%;height:auto;display:block;\"\u003e\u003cfigcaption style=\"font-size:13px;line-height:1.45;margin-top:8px;color:#555;\"\u003eAn Antminer S21+ Hydro hashboard passing bench validation: all 95 chips found on board H6HB70704, no issues detected\u003c\/figcaption\u003e\u003c\/figure\u003e\n\n\u003cp\u003eAll repairs are performed personally by Alex, who has been servicing ASIC miners since 2019. \u003ca href=\"https:\/\/antminer-repair.com\/pages\/aleksandr-muranov\"\u003eSee credentials →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/antminer-repair.com\/pages\/contact\"\u003eContact our repair team\u003c\/a\u003e today and get your miner back to full power.\u003c\/p\u003e","brand":"BITMAIN","offers":[{"title":"Default Title","offer_id":54672573530385,"sku":"HB-S21PLUSHYDRO","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/4917\/9921\/files\/antminer-s21-plus-hydro-hashboard-cold-plate-top-view_dccf91cb-89e5-4b95-820f-9eed0b4015dd.webp?v=1789458337","url":"https:\/\/antminer-repair.com\/products\/antminer-s21-plus-hydro-hashboard-repair-service","provider":"Antminer Repair","version":"1.0","type":"link"}