Antminer PSU Repair Specialists
Powering your uptime. We provide component-level repairs for Bitmain APW series power supplies, specializing in APW12 and APW17 units for S19 and S21 miners.
MOSFET & Rectifier
Replacement of blown power transistors and diodes using high-spec original components.
Control Board Fix
Repairing communication errors, PIC chip issues, and voltage regulation failures.
PFC Circuit Repair
Specialized diagnostics for Power Factor Correction stages and capacitor bank overhauls.
Surge Recovery
Restoring units damaged by grid instability, lightning strikes, or phase imbalances.
Professional PSU Repair in Action
Precision component-level restoration for Bitmain Power Supplies
Component Replacement
Replacing MOSFETs and high-voltage capacitors.
Voltage Regulation Test
Ensuring stable 12V-15V output under load.
Full Load Burn-in
24-hour continuous testing before shipping.
Proven Reliability
100% Honest Feedback from Verified ASIC Owners
"Fast turnaround on my APW17. Saved me hundreds compared to buying a new unit. Highly recommend."
"The only shop I trust with S21 power supplies. They know the complex circuitry inside these new units."
"They explained exactly what failed and fixed it within 3 days."
APW power supply dead with no output after a grid surge
A representative Bitmain APW-series PSU repair. The APW converts AC mains through a PFC stage and high-current switching section down to the ~12–15 V rail that powers the miner.
- Reported symptom
- After a storm, the miner would not power on at all. The PSU was completely dead — no 12 V output, no fan spin — with a faint burnt smell.
- On-bench diagnosis
- With no output rail, we worked back from the primary side: the input fuse was open and a primary-side switching MOSFET had shorted, so the PFC bus never came up. There was scorching around the switching stage and one rectifier tested leaky.
- Root cause
- A mains surge/overvoltage event drove the primary switching stage past its limits, blowing the MOSFET and fuse and stressing the PFC and rectifier — the classic cascade behind a "totally dead" APW.
- The repair
- We replaced the fuse, the shorted MOSFET and the leaky rectifier with original-spec parts, verified the PFC controller and capacitor bank, and cleaned up the scorched area before bringing the unit up on a current-limited supply.
- Outcome
- Stable output restored (~12–15 V under load). The PSU passed a 24-hour full-load burn-in before shipping back — saving the owner the cost of a new unit.
Representative case based on common APW-series PSU failure patterns and standard component-level repair procedure. Every unit is diagnosed individually — exact faults and pricing are confirmed after inspection.
Bitmain APW12 & APW17 PSU Repair — What We Fix
Bitmain's APW-series power supplies (APW12, APW11, APW17) are high-current, high-density units that take a lot of abuse — and they fail far more often than the miner realizes, taking a good hashboard offline with them. The faults we see most are dead units with no output, blown primary MOSFETs and rectifier diodes, PFC (Power Factor Correction) stage failures, aged or bulging capacitor banks, and control-board / voltage-regulation issues. Most are triggered by grid instability, surges, phase imbalance, or overloaded connectors.
We repair the APW at the component level with original-spec parts — restoring the power path, rebuilding the PFC and capacitor sections where needed, and verifying stable output (~12–15 V) under a full load with a 24-hour burn-in before return. It's a fraction of the cost of a new PSU. Pairs naturally with our hashboard repair for the S21 Pro / XP, S21 / T21 and Z15 series.
PSU Repair — Frequently Asked Questions
How much does Antminer PSU repair cost?
It depends on the fault, but PSU repair is almost always far cheaper than a replacement unit. We diagnose the power supply first and send a transparent, itemized quote before any work begins.
Which Antminer power supplies do you repair?
We repair the Bitmain APW series — APW12, APW11 and APW17 — that power the S19, S21, T21 and related Antminer models.
My PSU has no output / the miner won't power on — can you fix it?
Yes. No-output faults are usually a blown input fuse and primary-side MOSFET, a failed PFC stage, or a bad rectifier — often triggered by a surge. We trace the power path, replace the failed components with original-spec parts, and restore stable output.
What causes an Antminer PSU to fail?
The most common causes are grid instability and surges, phase imbalance, overloaded connectors, and aged capacitors — these blow MOSFETs and rectifier diodes or damage the PFC and control circuits.
Do you test the PSU before returning it?
Yes. Every repaired PSU is verified for stable output (roughly 12–15V) under a full load and put through a 24-hour burn-in before it ships back.
Related ASIC Repair Services
Need your Antminer PSU Repaired?
Professional mail-in repair for the Bitmain APW12 / APW11 / APW17 series — fast turnaround guaranteed.