Repair methods for Antminer S21 hashboard boost circuit failure
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Repair methods for Antminer S21 hashboard boost circuit failure
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China Mainland
Hong Kong
Business Hours: (GMT+8) 08:30-20:00 Mon to Sat
Company Phone: +86-023-72227777
National Day Holiday Notice
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Dear Friends,
Hello everyone, October 1-7, 2026 (GMT+8) are the National Day holidays in China. During this period, our customer support and course tutor teams may experience delays in responding to your inquiries.
We appreciate your patience and understanding. Normal response times will resume on October 6.
Thank you for your continued support.
Best wishes,
ZEUS MINING CO., LTD.
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