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1325 Rue Bergar, Laval, QC support@d-central.tech 1-855-753-9997 Mon-Fri: 8:30 - 18:00

ASIC Miner Symptom Checker — Step-by-Step Decision Trees

Quick answer

Pick the symptom that matches your miner and D-Central walks you through a step-by-step decision tree — from the quick checks to the board-level call — grounded in our Laval repair bench and the Mining Bible. Every path ends in a clear diagnosis, the matching error-code guide, and an honest fix-it-yourself vs. send-it-in answer.

Not sure where to start? Paste your log into the Kernel-Log Decoder and it points you to the right tree.

→ Kernel-Log Decoder · ASIC Fault Finder (650 codes)

Miner Powers On But Won't HashIf your miner powers up, the fans spin, but it reports 0 hashrate, the chips are either not initialising or a hashboard…Fans Spin But No HashrateFans roaring at 100% with no hashrate almost always means the firmware never got a healthy hashboard online, so it defaults the…One Hashboard Missing / Fewer ChipsWhen one chain shows 0 chips, or fewer than spec, the daisy chain is broken at a specific point. Everything downstream of…Miner Overheating / Thermal ShutdownAntminer firmware holds the chips in reset and drops voltage to zero above ~75°C to protect them. Recurring overheats are almost always…Miner Won't Boot / No Web InterfaceNo dashboard, no IP, no response usually means the control board never finished booting — corrupt storage, a bad firmware image, or…Hashrate Lower Than ExpectedA miner that runs but underperforms is usually losing chips, throttling on heat, or running a conservative profile. Find which one.Miner Keeps Dropping Off the NetworkIntermittent network loss costs you shares and makes a miner look "down" when the hardware is fine. Isolate cabling vs DHCP vs…PSU Dead / No PowerBefore condemning a PSU, rule out the wall, the cable, and a downstream short pulling it into protection. APW-series PSUs are repairable…Fan Error / Fan NoiseA fan fault will stop a miner outright to protect the chips. Fans are cheap and easy to swap, so this is…Board Not Recognised / EEPROM ErrorThe EEPROM stores each board's ID and calibration. If it can't be read, or three boards don't match, the controller refuses to…Pool Disconnects / Shares RejectedIf the hardware is healthy but you're losing shares, the problem is between the miner and the pool: credentials, latency, or an…Miner Randomly Restarts / RebootsRandom reboots are the firmware's watchdog protecting the miner after something went wrong — usually heat, a power dip, or a failing…

Can't find your symptom, or already know it's board-level? Skip ahead:

Fix it yourself

Work the matching symptom decision tree and error-code guide step by step. Most cable, cooling, network and firmware faults are solvable on the bench you already own.

Send it to D-Central

Cracked solder, dead domains, shorted chips and EEPROM faults need a real repair bench. See transparent repair pricing or get a free repair quote — we diagnose and repair 38+ ASIC models in Laval, board-level, since 2016.

Broken miner? Get a real quote.

Tell us the symptom and get an instant repair-tier estimate ($95 / $145 / $195 CAD). Mail-in from across Canada, bench in Laval, Quebec.

Send it to D-Central — start a repair →

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Last reviewed June 12, 2026.