From the bench
Diagnosis guides and repair-or-replace math, written by people who fix this hardware — not a content farm.
Diagnosis
Yaskawa V1000 and A1000 Faults oC, GF, ov and Uv1: Drive or Wiring?
What Yaskawa V1000 and A1000 faults oC, GF, ov, Uv1 and SC mean, how to tell a failed drive from a motor or power problem, and typical repair cost.
October 2, 2026
Guides
Siemens SIMODRIVE 611 Repair Cost (2026)
What Siemens SIMODRIVE 611 repair costs in 2026 — 6SN1123 power modules and 6SN1118 control cards, what moves the quote, and which modules we decline.
October 2, 2026
Guides
FANUC Spindle Amplifier Repair Cost (2026)
What FANUC spindle amplifier repair costs in 2026 — alpha, alpha i and beta i SPM ranges, what moves the quote, and when the fault is not the amplifier.
October 2, 2026
Diagnosis
FANUC PSM Alarm Codes 1 to 7: Power Supply Module or Incoming Power?
What FANUC power supply module alarms 1 through 7 mean on alpha and alpha i racks, ranked causes, the checks an electrician can do, and when to ship the PSM.
October 2, 2026
Guides
Allen-Bradley PLC Power Supply Catalog Numbers: 1746-P, 1756-PA/PB and 1769
How to read Allen-Bradley PLC power supply catalog numbers — 1746-P1 to P7, 1756-PA72/PB72/PA75 and 1769-PA2 — what substitutes for what, and repair cost.
October 2, 2026
Obsolescence
Siemens 6AV HMI Part Numbers Explained
How to read a Siemens 6AV article number — decode 6AV2 vs 6AV6, identify Comfort, Basic and Multi Panels, and know which families are discontinued.
September 11, 2026
Guides
Servo Amplifier Repair Cost (2026)
What servo amplifier repair costs in 2026 by brand — FANUC, Mitsubishi, Yaskawa, Allen-Bradley, Indramat and Siemens ranges, and what moves the quote.
September 11, 2026
Guides
PanelView Repair Cost (2026)
What Allen-Bradley PanelView repair costs in 2026 — flat prices for PVP6, PVP7, PanelView 800 and Standard, what moves the total, and when repair wins.
September 11, 2026
Diagnosis
FANUC Alarm 401, 410 and 411: Amplifier, Motor or Neither?
What FANUC servo alarms 401, 410, 411 and 414 actually mean, how to rank the causes, the DGN bits that name the real fault, and when to ship the amplifier.
September 11, 2026
Diagnosis
ControlLogix Fault LEDs: What Red, Flashing Red and Flashing Green Mean
Decode ControlLogix and CompactLogix module status LEDs — solid red, flashing red, flashing green — rank the real causes, and know which module to ship.
September 11, 2026
Guides
PLC Repair Cost (2026)
What PLC repair costs in 2026 — flat pricing on rack supplies, quoted ranges on I/O and comm modules, and the honest truth about dead CPUs.
September 4, 2026
Guides
Industrial Power Supply Repair Cost (2026)
What industrial power supply repair costs in 2026 — flat and quoted pricing by unit type, what moves the number, and when a repair beats a replacement.
September 4, 2026
Obsolescence
Indramat & Rexroth Drive Part Numbers Explained (DKC, DDS, HDS, TDM)
How to read Indramat and Bosch Rexroth drive part numbers, which family you actually have, what the FW suffix means, and what is still repairable in 2026.
September 4, 2026
Diagnosis
Allen-Bradley Servo Drive Faults: Ultra 3000 and Kinetix Diagnosis
How to read Allen-Bradley Ultra 3000 and Kinetix servo faults, separate drive faults from motor and feedback faults, and what is genuinely repairable.
September 4, 2026
Diagnosis
ABB ACS Drive Fault Codes 1, 2 and 6: Overcurrent and DC Bus Faults
What ABB ACS drive faults 1, 2 and 6 actually mean, how to diagnose them on the machine, which ones are board-level repairable, and what repair costs.
September 4, 2026
Diagnosis
Yaskawa Servopack Alarm A.10: Drive, Motor, or Cable?
Yaskawa alarm A.10 is overcurrent. How to isolate a failed Servopack power stage from a shorted motor or cable, realistic repair cost, and when to ship.
August 29, 2026
Guides
VFD Repair Cost (2026)
What VFD repair really costs in 2026 — typical ranges by brand and horsepower, what moves the quote, and when repair beats replacing the drive.
August 29, 2026
Guides
Siemens Comfort Panel Repair Cost (2026)
What Siemens Comfort Panel repair costs in 2026 — flat pricing by model, what changes the price, and when repair beats a discontinued replacement.
August 29, 2026
Diagnosis
PowerFlex Fault Codes F004, F005 and F012: Diagnose Before You Replace
PowerFlex F004, F005 and F012 explained — what each fault means, the checks a plant electrician can do, realistic repair cost, and when to ship it.
August 29, 2026
Obsolescence
FANUC A06B Amplifier Part Numbers Explained
How to read FANUC A06B servo, spindle and PSM part numbers — which series is which, what is discontinued, and the repair path for orphaned amplifiers.
August 29, 2026
Allen-Bradley
PanelView Plus 6 Is Discontinued — Your Real Options in 2026
Rockwell ended the PanelView Plus 6 line with no drop-in replacement. The honest repair-vs-migrate math for a plant still running 2711P terminals.
August 25, 2026
Diagnosis
The Flashlight Test: Diagnosing a Dark HMI Screen in 30 Seconds
A dark industrial touchscreen is usually a failed backlight, not a dead terminal. One flashlight tells you which, and what the repair should cost.
August 24, 2026
Diagnosis
Servo Alarm: Is It the Amplifier or the Motor? How to Tell Before You Spend
An overcurrent servo alarm can mean a failed amplifier, or a shorted motor that will kill the next amplifier too. How to isolate it before you spend.
August 23, 2026
Diagnosis
PLC Rack Dead? Check the Power Supply Before You Buy a CPU
A dark SLC 500 or ControlLogix rack is usually a $349 power-supply repair, not a four-figure processor. The 10-minute check that proves it.
August 22, 2026
Strategy
The Real Math of Repair vs. Replace for Industrial Electronics
Downtime cost, 12-24 week lead times, and discontinued platforms — the three numbers that decide repair-vs-replace, with sources.
August 21, 2026
Mitsubishi
Mitsubishi MR-J2S Is Long Obsolete. Repair It, Exchange It, or Migrate?
The MR-J2S servo family runs a huge installed base of CNC and automation axes. AL.32 killed one of yours — here are the three real paths, priced honestly.
August 20, 2026
Mail-In
How to Pack an HMI or Servo Drive So It Survives the Truck
Carrier damage is the one failure a repair lab can't fix cheaply. The packing method that gets a $2,000 unit across the country intact.
August 19, 2026
Mail-In
Will My Program Survive the Repair? (Yes — Here's Where It Actually Lives)
The number-one mail-in repair fear, answered platform by platform: where HMI programs and drive parameters actually live, and why repairs never touch them.
August 18, 2026
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