Nationwide mail-in · Dallas–Fort Worth bench lab
Your machine back in production in days — not weeks.
HMIs, servo drives, VFDs, PLCs, CNC boards, and industrial power supplies — repaired at board level with real published prices, not RFQs. Buy the repair online in two minutes, ship the unit, and it returns tested under a 24-month warranty. If we can't fix it, you don't pay for it.
Or search your exact part number:
✓Fixed — or it's free
Unrepairable units are refunded; evaluations cost $0
✓24-month warranty
Every repair covered, parts and labor
✓3–5 business days bench time
Rush (1–2 day) and emergency service available
✓Program preserved
Your application and settings stay in the unit
What we repair
Six categories, honestly scoped: flat-price checkout where the failure set is bounded, free evaluation where a firm quote should come first.
HMI & Touchscreen Repair
Dead displays, unresponsive touchscreens, boot loops, and failed power supplies on industrial operator interfaces — repaired at board level with your machine program preserved. PanelView, SIMATIC, Pro-face, GOT, NS-series and more.
Flat pricing — buy online →
Servo Drive & Amplifier Repair
Alarm-faulted, dead, or tripping servo drives and amplifiers — FANUC, Mitsubishi, Yaskawa, Allen-Bradley Kinetix, Siemens, Indramat. Free bench evaluation, firm quote before any work, component-level repair with new power stages where needed.
Free evaluation + firm quote →
VFD & AC Drive Repair
Faulted or dead variable frequency drives — Allen-Bradley PowerFlex, ABB, Yaskawa, Danfoss, Mitsubishi, and more. Free evaluation, component-level power-stage repair, and load-verified testing appropriate to the drive class.
Free evaluation + firm quote →
PLC Module Repair
Failed PLC power supplies, processors, and I/O — including obsolete families that are no longer sold new. ControlLogix, CompactLogix, SLC 500, PLC-5, MicroLogix, SIMATIC S7 and more.
Free evaluation + firm quote →
CNC Electronics Repair
Board-level repair for CNC machine electronics — FANUC boards and amplifiers, control power supplies, operator panels, and monitors for Haas, Mazak, Okuma, Fadal, and other machine tools.
Free evaluation + firm quote →
Industrial Power Supply Repair
Dead or unstable industrial power supplies — PLC rack supplies, CNC control supplies, DIN-rail 24VDC units, and OEM machine supplies that are obsolete or long-lead. Board-level repair with full load testing.
Flat + free evaluation →
Popular repairs
Discontinued PanelViews, FANUC amps, MR-J2S drives — the units that go down most.
Allen-Bradley
$499PanelView Plus 6 Repair
Dead screen, unresponsive touch, or boot loop on a discontinued PanelView Plus 6? Flat-price repair with your application preserved — no replacement exists.
3–5 business days in lab · Buy online now →
Allen-Bradley
$649PanelView Plus 7 Repair
Factory-channel PanelView Plus 7 repairs are quoted at $2,700–$4,000. Ours is a flat $649 — same bonded-glass repair, 24-month warranty.
3–5 business days in lab · Buy online now →
Siemens
$499Siemens Comfort Panel Repair
The classic Comfort Panel failure is a power-supply that quits — a clean bench repair. Flat $499 with your WinCC project preserved.
3–5 business days in lab · Buy online now →
FANUC
Free evaluationFANUC Servo Amplifier Repair
Alarm 8, 12, or a dead amp on a FANUC machine? Free bench evaluation, firm quote before any work — most repairs land between $650 and $1,500.
3–5 business days in lab · Free evaluation →
Mitsubishi Electric
Free evaluationMitsubishi Servo Amplifier Repair
MR-J2S amps run half the CNC world and fail the same way — a blown IPM. Free evaluation; typical repairs $450–$950.
3–5 business days in lab · Free evaluation →
Allen-Bradley
Free evaluationPowerFlex VFD Repair
PowerFlex drives up to 25 HP — free evaluation, typical repairs $350–$900 against four-figure replacements.
3–5 business days in lab · Free evaluation →
Multi-brand
$349PLC Power Supply Repair
A dead rack is usually a dead power supply — and power supplies repair beautifully. Flat $349, load-tested before return.
3–5 business days in lab · Buy online now →
Pro-face
$449Pro-face HMI Repair
Pro-face touchscreens run machines for decades — until the backlight or digitizer quits. Flat $449 repair, project preserved.
3–5 business days in lab · Buy online now →
Why plants repair instead of replace
- The replacement often doesn't exist. PanelView Plus 6 was discontinued in 2021 with no direct successor. PLC-5 ended in 2017. Siemens S7-300 hit type-discontinuation in October 2025. Repair is the only like-for-like path for a growing share of installed hardware.
- Lead times are brutal; repair is days. New drives and HMIs routinely quote multi-week lead times. Our standard bench time is 3–5 business days after arrival — rush cuts it to 1–2.
- Your program stays put. A replacement means re-loading, re-configuring, and re-proving the application. A repaired unit drops back in exactly as it left.
- The math favors repair. Industrial repairs typically run 15–50% of replacement cost — and unplanned downtime averages ~$103,000/hour in US plants (ABB, 2023). Every day saved matters more than the invoice.
How it works
- 1
Start your repair online
Buy a flat-price repair or request a free evaluation. Either way you get an RMA number and shipping instructions instantly.
- 2
Ship us the unit
Pack it well, write the RMA on the box, and ship to our Dallas–Fort Worth lab with any carrier. Packing guides are in your confirmation.
- 3
We diagnose and repair
Bench diagnosis, board-level repair with quality components, aged capacitors replaced as standard, then full functional testing. Quote-track units get a firm quote for your approval before any work.
- 4
Tested, returned, warrantied
Your unit ships back with the return speed you chose — covered by a 24-month warranty, with your program and settings preserved.
Brands we service (independent repair — not OEM-affiliated)
Maintenance teams, integrators & repair resellers
Commercial accounts get priority bench queue, PO acceptance, and a dedicated contact. Integrators and machine-service companies get wholesale repair pricing to mark up — your customer, your invoice.
Frequently asked questions
How does mail-in industrial repair work?
Start a repair online (flat-price checkout or free-evaluation request), get an RMA number instantly, and ship the unit to our Dallas–Fort Worth lab with any carrier. We diagnose and repair at board level, test, and return it with the return speed you chose — under a 24-month warranty.
Do you publish real prices?
Yes — that is the point of this company. Flat-price repairs (most HMIs and PLC power supplies) are purchasable online at the listed price. Drives and boards start with a free evaluation and a firm quote you approve before any work; the typical ranges published on those pages come from real market data, not guesswork.
Will my machine program survive the repair?
Yes. HMI applications live in the terminal's flash memory, drive parameters live in the CNC or the drive's protected storage, and our physical repairs don't touch them. Preserving the configured unit is exactly why plants repair instead of replace.
What if my unit can't be repaired?
Flat-price repairs: full refund minus return shipping. Free-evaluation units: you pay nothing at all. We'd rather tell you the truth than sell a repair that shouldn't happen.
What does downtime actually cost me while I wait for a replacement?
ABB's 2023 survey put average US unplanned-downtime cost at ~$103,000 per hour, and new HMIs/drives frequently quote multi-week lead times. Repair turns that around in days — which is why rush and emergency bench service exist.
Machine down? Let's get it back up.
Start a repair online in two minutes, or send us the part number for a free technician review.
The Fixed-or-Free Guarantee: if we can't repair it, you don't pay for the repair.
Call (817) 799-7332 · 📱 Text us a photo of your unit · Email repairs@controlboardlab.com