Antminer S21pro Control Board A113D AMLogic CPU
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Antminer S21 Pro Control Board | AMLogic A113D CPU Replacement Motherboard
The Antminer S21 Pro control board with AMLogic A113D CPU is the dedicated replacement motherboard for the S21 Pro miner. Manages hashboard communication, pool credentials, network reporting, and fan control — the brain of the miner. When the original board fails after a fault event or extended duty, this brand-new drop-in restores the miner to full operation without rebuilding from scratch.
Plug-and-play design — disconnect the failed board, connect the new one to the existing hashboard ribbons and PSU harness, power on. The S21 Pro firmware boots on first power-up; reconfigure pool credentials and the miner is back hashing. Tested before shipment to confirm baseline operation.
When to Replace the S21 Pro Control Board
- Miner refuses to boot — no LED activity, no network response even with PSU confirmed healthy.
- Stuck at startup / never reaches admin page — controller hangs during early boot.
- Hashboards reported missing (0/3 or 1/3) — controller can't enumerate boards.
- Repeated reboots with no clear PSU fault — controller-side instability after thermal and rail checks come back clean.
- Visible damage on the PCB after a coolant intrusion or fault event.
Antminer S21 Pro Control Board Specifications
| Feature | Specification |
|---|---|
| Model | Antminer S21 Pro Control Board |
| CPU | AMLogic A113D |
| Compatibility | Antminer S21 Pro |
| Function | Pool connection, hashboard signalling, fan control, web UI |
| Installation | Plug-and-play — no firmware flash required out of box |
| Reset Workflow | Standard pool credential re-entry after install |
| Weight | 80g |
| Condition | Brand New |
FAQ — Antminer S21 Pro Control Board
Q: How do I confirm the control board is the failed part?
A: Swap the PSU first (most common point of failure) and check that the hashboards aren't all simultaneously failed. If the miner is dead with a known-good PSU and at least one good hashboard, control board is the next-likely fault — especially if there's no LED activity or network response at all.
Q: Will the miner need a firmware flash after the swap?
A: Most replacement boards ship with stock firmware. After install, expect to set pool credentials and check firmware version on the admin page. If hash performance is off, flash the latest stock firmware.
Q: Does this board work on S21 / S21+ / S21 Hyd?
A: No — S21 Pro only. Other S21 variants use different controller hardware (Ctrl_C76 series, different SoC). Match the variant on your specific miner exactly.
Q: Bulk pricing for fleet operators?
A: Yes — email contact@lys-sz.com for volume pricing on S21 Pro control board stock.
Related products
- Antminer S21 / T21 Control Board Amlogic A113D Ctrl_C76
- BM1370 Series ASIC Chip Tester (S21 Pro / S21+ / S21XP)
- MAX809REUR+T Monitor IC (S19K Pro C76 Board)
- Universal Hashboard Test Fixture (S19 / S21 / T21)
S21 Pro fleet operators stocking control boards in volume? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
