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

Quick answer

When one chain shows 0 chips, or fewer than spec, the daisy chain is broken at a specific point. Everything downstream of the break goes invisible to the controller.

A partial chip count pinpoints the break: it's the chip immediately after the last one detected.

Full diagnostic flow

Power off and wait 30s. Reseat the 18-pin signal cable and power cables on the affected board, then power on. Any change?
  • Board now detects → It was a loose or dirty connector — the cheapest fix there is. Keep an eye on it; recurring drops mean a worn cable or socket. [Fix it yourself]
  • Still missing/low → Swap the suspect board into a known-good chain slot (or swap the cable). Does the fault follow the board?
Swap the suspect board into a known-good chain slot (or swap the cable). Does the fault follow the board?
  • Fault follows the board → How many chips does the bad board report?
  • Fault stays with the slot/cable → The control-board chain port or the signal cable is at fault, not the hashboard. Replace the cable; if the port is dead, the control board needs repair. [DIY with care] Error-code guide →
How many chips does the bad board report?
0 vs a partial count tells you two different stories.
  • Exactly 0 chips → Either a shorted chip pulling the signal lines down, or no domain voltage at all (boost/PIC/EEPROM). Measure power-input resistance and boost output. Bench repair. [Send it in] Error-code guide →
  • A partial count (e.g. 29 of 108) → Classic chain break. The break is at the chip just after the last detected one — a dead ASIC, a cold joint on CO/CLKO/NRSTO, or a failed level shifter. Use the binary-search (dichotomy) method to isolate it. Bench repair. [Send it in] 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

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Last reviewed June 12, 2026.