Antminer S19J / S19J Pro BB BeagleBone control board

The Antminer S19J / S19J Pro BB BeagleBone control board (often called the BB board or BeagleBone Black control board) is a replacement or upgrade control board for Bitmain’s Antminer S19J and S19J Pro series ASIC miners (SHA-256 for Bitcoin mining). It’s based on the BeagleBone Black (BBB) platform (using an AM335x ARM Cortex-A8 processor), which provides a balance of performance, flexibility, and compatibility with custom firmware like Braiins OS, Vnish, LuxOS, or others for overclocking, autotuning, or advanced monitoring.

This board is popular among miners for replacing faulty stock boards (e.g., Amlogic A113D or older Xilinx/Zynq variants) or enabling custom firmware that isn’t supported on newer Amlogic boards. It typically comes as a combo: the BB board (main processor board) + IO board (for connections like Ethernet, fans, and hashboards).

Here are clear product views of the Antminer S19J / S19J Pro BB BeagleBone control board, showing the compact dual-board design (BB top board with SD card slot and IO bottom board), ports, and typical black PCB layout:

Additional angles, including close-ups of the SD card slot (hidden under the miner cover), Ethernet port, and installed examples in an S19J Pro chassis:

Key Specifications

• Compatibility: Antminer S19J, S19J Pro (air-cooled models; works with most variants, including sub-110TH/s S19 Pro batches)
• Processor: BeagleBone Black (AM335x ARM Cortex-A8)
• Features: SD/TF card slot (for firmware flashing; access requires opening the miner top cover), Ethernet RJ45, USB support, fan control, hashboard communication
• Firmware Support: Excellent for custom options (e.g., Braiins OS for autotuning, Vnish for overclocking, LuxOS for heat reuse)
• Installation: Plug-and-play replacement (slide-in design in most S19J series); no major wiring changes needed, but ensure SD card access (some hoods need cutouts for easier flashing)
• Noise/Heat: No impact (board itself is low-power)
• Other Notes: Often sold as a combo (BB + IO board); some vendors offer pre-flashed with custom firmware

Here are more detailed shots highlighting the board layout, connectors, and SD slot position:

Features and Use Case

This board is ideal for:

• Repairing faulty stock control boards (e.g., no boot, hashboard errors)
• Upgrading to custom firmware for better efficiency, higher hashrate (e.g., +10-20% overclock on S19J Pro), or features like dynamic power scaling
• Avoiding Amlogic limitations (newer boards often block easy flashing) Users report reliable performance, easier flashing (via SD card), and compatibility with tools like Braiins Toolbox or HashCore. It’s a common choice for home/farm miners in Romford, UK, optimizing older S19J units amid high difficulty.

Pricing and Availability

Pricing: ~$18–$100 USD (often $50–$80 for full combo board; cheaper for just the BB top board). Widely available on Zeus Mining (~$18–$20), Pre-flashed versions (e.g., with LuxOS) cost $80–$100+.

Compared to other S19 series boards:

• Vs. Amlogic A113D (newer stock): BB allows easier custom firmware but may need cover mods for SD access.
• Vs. Xilinx/Zynq (older): BB is a direct replacement with similar flexibility.

If you’re replacing a board on your S19J/S19J Pro in Romford (current date January 20, 2026), check your miner’s stock board type first (look for SD slot location). Let me know if you need flashing guides, custom firmware recommendations, or profitability calcs for upgraded S19J Pro units!