Quick answer

Intermittent network loss costs you shares and makes a miner look "down" when the hardware is fine. Isolate cabling vs DHCP vs the on-board Ethernet.

Most network drops are cabling, DHCP lease, or switch issues — not the miner.

Full diagnostic flow

Does it drop only the network, or does the whole miner reboot?

Whole miner reboots → That's not a network fault — see the random-restart tree (watchdog, heat, or power). [DIY with care] Error-code guide →
Only loses network → Set a static IP (outside the DHCP pool) and watch. Still dropping?

Set a static IP (outside the DHCP pool) and watch. Still dropping?

Static IP fixed it → It was DHCP — lease exhaustion or a flaky DHCP server. Keep the static IP, or fix the DHCP pool/reservation. [Fix it yourself] Error-code guide →
Still drops with static IP → Swap the Ethernet cable and switch port. Still dropping?

Swap the Ethernet cable and switch port. Still dropping?

New cable/port fixed it → Cabling or switch port. Use quality cable and a known-good port; check for PoE/EMI on long runs. [Fix it yourself] Error-code guide →
Still drops on good cable/port → The on-board Ethernet PHY on the control board is likely failing. Replace/repair the control board. [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.