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A failed BB control board causes the miner to stop booting
Connect the device under test to the output terminals — observe the current readout for normal idle
Feature Specification Compatible Hashboard Whatsminer M50 (105 chips OR 111 chips variant) Target Miner Hashrate 110-122 TH/s SHA-256 at 3306W Stencil Material High-grade stainless steel
telecom equipment)
Stuck at startup / never reaches admin page — controller hangs during early boot
Antminer S21 Immersion-Cooling Miner SJ00W US Certified 1.5m Oil-Resistant Power Cord kf1960 A failed BB control boardAntminer S21 Immersion SJ00W Oil Resistant Power Cord US Certified 14AWG 1. 5m The Antminer S21 Immersion SJ00W Oil Resistant Power Cord is a US certified, 14AWG cable built specifically for Bitmain's S21 IMM oil immersion cooling miners. At 1. 5 meters, it provides adequate reach within standard immersion tank setups while maintaining a heavy duty 14AWG wire gauge that handles the S21's full power draw without voltage drop. The oil resistant outer
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