{"product_id":"antminer-ks7-hashboard-repair-service","title":"Antminer KS7 Hashboard Repair Service","description":"\u003cp\u003e\u003cstrong\u003eYes — Antminer KS7 hashboard repair fixes the most common KS7 fault, a chain reporting fewer than its designed 108 ASICs. On a KS7 board that reading can come from a failed BM2384BA chip, an unstable 1.1-1.2 V domain, EEPROM data, or a broken signal line. Repaired boards are validated under real mining load.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA KS7 board either reports all 108 ASICs or it reports none, and Antminer KS7 hashboard repair begins by working out which of the twelve power domains broke that chain. Bitmain moved this generation onto new silicon and a new control platform, so KS3 and KS5 experience only carries you so far. We diagnose the KS7 on its own architecture, repair at component level, and prove the result under mining load rather than on a bench alone.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Diagnostics and Common Issues with Antminer KS7\u003c\/h2\u003e\n\n\u003ch3\u003eQuick Symptom Checklist\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMiner comes up with two hashboards instead of three, or reports a chain as missing\u003c\/li\u003e\n\u003cli\u003eKernel log records \u003ccode\u003eerror=\"asic num error\" msg=\"detected asic num less than design(0\u0026lt;108)\"\u003c\/code\u003e\n\u003c\/li\u003e\n\u003cli\u003eA chain returns a partial count such as \u003ccode\u003e85\u0026lt;108\u003c\/code\u003e or \u003ccode\u003e99\u0026lt;108\u003c\/code\u003e and is powered off by the firmware\u003c\/li\u003e\n\u003cli\u003eBoard hashes for a few minutes after a cold start, then drops out once the miner warms up\u003c\/li\u003e\n\u003cli\u003eAbnormal temperature readings, \u003ccode\u003etemp sensor read failed\u003c\/code\u003e, or thermal shutdowns on one board only\u003c\/li\u003e\n\u003cli\u003eControl board log shows a fan at \u003ccode\u003efanspeed=0\u003c\/code\u003e (e.g. \u003ccode\u003efanid=1 fanspeed=0\u003c\/code\u003e, FAN1) - worth ruling out before assuming a board fault\u003c\/li\u003e\n\u003cli\u003eBoard is detected on a bench fixture but never initialises inside the miner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDiagnostic Decision Tree\u003c\/h3\u003e\n\u003cp\u003eThe same log line can come from several different root causes on a KS7. This is the order we check, before any component is touched.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin-top: 20px; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-family: sans-serif; font-size: 14px;\"\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;\"\u003eSymptom\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eLikely Cause\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eWhat We Check First\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;\"\u003e\n\u003ccode\u003edetected asic num less than design(0\u0026lt;108)\u003c\/code\u003e, whole chain reports zero\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eDomain voltage, EEPROM data, or signal line fault upstream of the chips - not necessarily a dead chip\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eDomain voltage per domain, EEPROM read at the signal connector, signal line continuity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003ePartial count, e.g. \u003ccode\u003e99\u0026lt;108\u003c\/code\u003e or \u003ccode\u003e85\u0026lt;108\u003c\/code\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eOne of the 12 domains lost power or signal, taking its 9 chips offline as a block\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eWhich domain stopped responding, then the 9 chips inside that domain individually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eFull 108\/108 on a bench fixture, drops out once the miner reaches operating temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eCold pass, warm failure - a connection or component that only fails under real current and heat\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eBehaviour under load in a live miner, not just a cold fixture pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eZero ASICs detected, chips visually intact under inspection\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eEEPROM, clock\/reset line, or connector corrosion producing the same log line as a dead chip\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eEEPROM integrity and connector condition before any chip is suspected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003ccode\u003etemp sensor read failed\u003c\/code\u003e, thermal shutdown on one board only, or a control-board log showing a fan at \u003ccode\u003efanspeed=0\u003c\/code\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eSensor fault or thermal interface issue on that board - or simply a stalled fan raising case temperature, which is not a hashboard fault at all\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eFan RPM at each position first, then sensor response independently of chip domain status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eBoard detected on a bench fixture, never initialises inside the miner\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eCommunication mismatch between the hashboard and the Amlogic control board\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eSignal path and connector between hashboard and control board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eThis table narrows down the likely cause before diagnostics begin. It is not a repair guide - domain isolation, EEPROM checks, and chip-level work are performed on the bench with STASIC and ASIC REPAIR testers, not at home.\u003c\/p\u003e\n\n\u003cp\u003eOne real example from the field: a control board log reading \u003ccode\u003efanid=1 fanspeed=0\u003c\/code\u003e, referencing FAN1, looks like a board-level thermal fault at first glance. It is the cooling fan itself, not the hashboard. Confirming fan RPM at each position before assuming a board defect avoids paying for chip-level repair when a \u003ca href=\"\/products\/bitmain-antminer-6000-rpm-fan-nidec-or-similar\" title=\"Bitmain Antminer Cooling Fan Replacement\"\u003efan replacement\u003c\/a\u003e would have solved it.\u003c\/p\u003e\n\n\u003ch3\u003eModel-Specific Patterns We See on Antminer KS7\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold pass, warm failure.\u003c\/strong\u003e KS7 boards frequently show a full chip count on a fixture and then fall out of the chain once real current and case temperature arrive. This is the dominant pattern on the model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFailures arrive nine chips at a time.\u003c\/strong\u003e The 108 chips are grouped into 12 domains of 9. A single unstable domain removes nine ASICs at once, and everything downstream of the break stops answering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePartial detection is not a working board.\u003c\/strong\u003e KS7 firmware powers the chain off unless all 108 chips respond, so there is no reduced-hashrate fallback to run on while you decide what to do.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero ASICs with physically intact chips.\u003c\/strong\u003e Domain voltage, EEPROM at the signal connector, clock and reset lines, connector corrosion, or fatigued solder joints all produce the same log entry as a dead chip.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cfigure style=\"margin: 0 0 25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0788\/4917\/9921\/files\/antminer-ks7-hashboard-dust-buildup-corrosion-damage.webp\" alt=\"Antminer KS7 hashboard dust buildup and corrosion around components\" loading=\"lazy\" style=\"max-width: 100%; height: auto;\"\u003e\n\u003cfigcaption style=\"font-size: 13px; color: rgb(102, 102, 102); margin-top: 8px;\"\u003eDust and corrosion on a KS7 hashboard. The clear front shield slows contamination down but does not keep it off the board.\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\n\u003ch3\u003eHardware Notes\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-top: 20px; margin-bottom: 25px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-family: sans-serif; font-size: 14px;\"\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;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\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;\"\u003eMiner model\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eBitmain Antminer KS7 (36 \/ 40 \/ 45 TH\/s bins)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eAlgorithm \/ coin\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003ekHeavyHash \/ Kaspa (KAS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eHashboards per miner\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e3 boards, 324 ASIC chips in total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eASIC chips per board\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e108\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eASIC chip marking\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eBM2384BA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eDomain structure\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e12 domains, 9 chips per domain, approximately 1.1-1.2 V per domain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eBoard base and cooling stack\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eAluminium substrate, 5 heatsinks per board: 3 below and 2 above the PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003ePower and control components\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eNo on-board VRM; EEPROM located next to the signal connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eHashboard part number\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eA3KK34601, revision V1.1010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eControl board platform\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eAmlogic. KS3 and KS5 use Cvitek, so control boards and firmware are not interchangeable with the KS7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgb(238, 238, 238);\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003eCooling type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eAir-cooled, 4 fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cfigure style=\"margin: 0 0 25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0788\/4917\/9921\/files\/antminer-ks7-bm2384ba-asic-chip-marking-macro.webp\" alt=\"Antminer KS7 BM2384BA ASIC chip marking macro photo\" loading=\"lazy\" style=\"max-width: 100%; height: auto;\"\u003e\n\u003cfigcaption style=\"font-size: 13px; color: rgb(102, 102, 102); margin-top: 8px;\"\u003eBM2384BA ASIC on an Antminer KS7 hashboard - 108 of these sit on every board\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\n\u003ch3\u003eDiagnostics Focus\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDomain isolation before chip work.\u003c\/strong\u003e A short chip count on a KS7 names nothing on its own. We separate domain behaviour, EEPROM, and the signal path from actual chip failure before a single BM2384BA is touched, because replacing silicon on a guess is how a repairable board becomes scrap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBehaviour under real heat and current.\u003c\/strong\u003e Since the model's signature fault appears only when warm, diagnostics aim to reproduce the failure at operating temperature rather than confirm a board looks fine cold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOur Professional Repair Process\u003c\/h2\u003e\n\n\u003ch3\u003eGotchas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening a KS7 board to \"just look\" is not reversible.\u003c\/strong\u003e Five heatsinks come off, three from below and two from above, and the thermal interface then has to be reapplied on both faces of the PCB. Boards that reach us after a home inspection always need the full thermal stack redone, regardless of the original fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA bench pass proves very little on this model.\u003c\/strong\u003e A KS7 board can report all 108 chips on a fixture and still drop out minutes after the miner reaches operating temperature and full current draw, which is why bench validation alone is never the last step here.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Service Scenario\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe miner boots with two boards, logs \u003ccode\u003easic num error\u003c\/code\u003e on the third, and hashrate settles at roughly two thirds of normal.\u003c\/li\u003e\n\u003cli\u003eA board arrives after a supply fault or hard power loss. Worth noting that a chain lost this way is not always the board, so power supply behaviour is checked before any board-level conclusion.\u003c\/li\u003e\n\u003cli\u003eThe board has run in dusty air. The KS7 carries a clear plastic shield bonded along the front edge, and as the photo above shows, it slows contamination down rather than stopping it, so dust and corrosion still reach the components over time.\u003c\/li\u003e\n\u003cli\u003eHumid or coastal installations, where oxidised connectors and signal lines read as a chain fault while the chips themselves are intact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Happens After Intake\u003c\/h3\u003e\n\u003cp\u003eEvery board goes through incoming inspection, board-level diagnostics, component-level repair, cleaning, and thermal interface replacement where required. Bench validation is done on STASIC and ASIC REPAIR testers, then the board is run in a real miner under load for a minimum of one hour before it is approved. Extended burn-in testing is available as a separate add-on service. The service covers diagnostics, component-level repair, and one BM2384BA ASIC replacement where diagnostics confirm a failed chip; \u003ca href=\"\/products\/bm2384ba-chip-replacement-add-on-for-antminer-ks7-hashboard-repair\" title=\"BM2384BA Chip Replacement Add-On for Antminer KS7\"\u003eany additional chips are quoted separately\u003c\/a\u003e at current supplier pricing, since BM2384BA availability fluctuates.\u003c\/p\u003e\n\n\u003ch3\u003eDiagnostics and Validation Equipment\u003c\/h3\u003e\n\u003cp\u003eBench work is done on STASIC and ASIC REPAIR testers, which is what makes domain-level isolation on a 108-chip board practical rather than guesswork. Final validation always happens in a live KS7 under mining load, because this is the point at which a cold-passing board reveals whether it was actually repaired.\u003c\/p\u003e\n\n\u003cp\u003eAll repairs are performed personally by Alex, 7 years of ASIC repair experience. \u003ca href=\"https:\/\/antminer-repair.com\/pages\/about-us\"\u003eSee credentials →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/antminer-repair.com\/pages\/contact\"\u003eContact our repair team today and get your miner back to full power.\u003c\/a\u003e\u003c\/p\u003e","brand":"Antminer Repair","offers":[{"title":"Default Title","offer_id":54090539073809,"sku":null,"price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/4917\/9921\/files\/antminer-ks7-hashboard-108-asic-chips-top-view.webp?v=1785872365","url":"https:\/\/antminer-repair.com\/products\/antminer-ks7-hashboard-repair-service","provider":"Antminer Repair","version":"1.0","type":"link"}