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control boards
Verify both connections are firm — a partially seated plug will arc under the high current draw
Pre-deployment QC — chip-level rework on used control boards before redeployment
Bitmain S21 Imm to PDU Conductor Material Stranded copper Application Dielectric-fluid submerged mining Weight 400g Condition Brand New
Clean the pads of old solder
Antminer S21 Hydro Silicone Grease Fixture for Even Application and Hashboard repair apw11 control boardsAntminer S21 Hydro Silicone Grease Fixture Original Steel Mesh Thermal Silicone Application Template for Even, Quick Grease Distribution on Antminer S21 Hydro Hashboard ASIC Chips During Repair and Periodic Re Pasting Maintenance The Antminer S21 Hydro Silicone Grease Fixture is the original spec thermal silicone application tool for S21 Hydro hashboard maintenance. Designed specifically for the hashboard ASIC chip array, this fixture ensures the even
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