Dead HMI — No Lights, No Boot
A completely dead operator terminal is usually a failed onboard power supply — aged capacitors, a failed regulator, or a blown input stage after an electrical event. The application in flash memory is almost always intact and comes back with the repair.
What's usually behind it
Electrolytic capacitor aging
The dominant cause. Capacitors dry out with heat and years; the supply sags, restarts, then quits. A full recap with quality components is standard in our repairs.
Input-stage damage
Surges and miswiring take out the input fuse, MOVs, and rectifier. Repairable at board level in most cases.
DC-DC converter failure
Internal rails fail even with good input power. Diagnosed on the bench with the unit under load.
Repairs that fix this
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 →
Siemens
$549Siemens MP277 / MP377 Repair
Obsolete Multi Panels with scarce replacements — repaired at a flat $549 with your project intact.
3–5 business days in lab · Buy online now →
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