Skip to content

Bitcoin accepted at checkout  |  Ships from Laval, QC, Canada  |  Expert support since 2016

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

Quick answer

Fans roaring at 100% with no hashrate almost always means the firmware never got a healthy hashboard online, so it defaults the fans to full. Find out why the boards aren't coming up.

Full-speed fans + no hash = the controller never saw working boards. It's a board or signal-cable problem, not the fans.

Full diagnostic flow

Does the dashboard/log load and show hashboard status?
  • Yes, it loads → What do the chains report?
  • No, web UI won't load → The control board may be hung or its storage corrupt. Power-cycle, confirm the IP, and re-flash the controller if it stays dead. [Fix it yourself] Error-code guide →
What do the chains report?
  • 0 chips on one or more chains → A board failed to enumerate, so the firmware ran fans to max as a safety default. Reseat the 18-pin signal cable; if still 0, the board needs bench diagnosis (chain break / shorted chip). [Send it in] Error-code guide →
  • All chips present but 0 hashrate → Do any temperature sensors read an impossible value (e.g. 0, -40, or 200)?
Do any temperature sensors read an impossible value (e.g. 0, -40, or 200)?
  • Yes, a sensor looks broken → A failed temp sensor makes the firmware assume the worst and run fans flat-out while refusing to hash. Replace the sensor / clear the I2C fault. [Advanced DIY] Error-code guide →
  • Temps look normal → Suspect a voltage-domain or PLL init problem holding the chips off. Check domain voltages and the kernel log for init/voltage errors. [Advanced DIY] Error-code guide →

This points at board-level damage. You can attempt it, but the realistic call for most owners is to send it to a repair bench.

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.

More tools: Kernel-Log Decoder · ASIC Fault Finder (650 codes) · All symptom trees

Related products, repair, and setup paths

Last reviewed June 12, 2026.