HMI Repair | PanelView Plus, Siemens, Pro-face Touchscreen Repair

Get operators back in control

A failed HMI can leave a running machine with no way to monitor it, change settings or clear alarms. AST repairs operator interface panels, touchscreen HMIs, industrial monitors and CNC display units from all major manufacturers.

We diagnose each HMI at the component level and quote on the damage we find. Repairing the original panel keeps your application, screens and wiring as they are, so there's nothing to reprogram or re-cut.

AST technician at an electronics repair bench with a circuit board rework station, test computer, and PLC racks mounted on the wall — An AST electronics bench, with a board rework station on the left and PLC racks on the wall for testing HMI communication.

Same-day rush evaluations
Touchscreens, displays and backlights replaced
Power supply and main board repair
Your application left in place where the memory is intact
Tested with a running application and communication to a PLC
Replacement and remanufactured HMIs in stock
1-year in-service warranty

Before you send an HMI

Back up the application file (for example the .MER/.APA file on a PanelView Plus or the project in TIA Portal or WinCC for Siemens) if you can. Tell us the catalog number from the label, the firmware revision if known, and the symptom.

Process

How we repair an HMI

Incoming inspection
We record the catalog number, firmware and symptom, and inspect for cracked glass, burn marks and liquid damage.
Power and boot test
The panel is powered on the bench to see whether it boots, displays and responds to touch.
Component repair
Failed touchscreens, LCDs, backlights or inverters, power supplies and board components are replaced.
Application test
A running application is loaded or kept, and touch calibration, keys and display are checked across the full screen.
Communication test
Ethernet, serial and fieldbus ports are tested against a PLC before the unit ships.

Diagnosis

Common HMI failures

HMI problems we fix

Touchscreen doesn't respond, or responds in the wrong place
Dim, flickering or black display
Lines, dead pixels or a cracked screen
Won't boot, or stuck on the startup screen
Keys or membrane keypad not working
No communication with the PLC
Random resets or lockups

Common causes

Worn or damaged resistive touch layer
Failed backlight or backlight inverter
Power supply failure on the main board
Corrupted or failed internal memory card
Heat, vibration and wash-down damage
Failed communication port components

Models

HMIs we commonly repair

Not a complete list. Send us the catalog number and we'll confirm.

HMI models
Brand	Product families we commonly see
Allen-Bradley	PanelView Plus 6, PanelView Plus 7, PanelView Plus 1000/1250/1500, PanelView Component, legacy PanelView Standard (2711)
Siemens	SIMATIC Comfort Panels (TP/KP), Basic Panels (KTP), MP 277/377, TP 177/277 and older OP/MP series
Pro-face	GP and SP5000 series
Mitsubishi Electric	GOT1000 and GOT2000 series
Omron	NS, NA and NB series
Schneider Electric	Magelis HMIGTO and XBT series
Beijer / Maple / Red Lion	Operator panels and industrial PCs
CNC operator panels	FANUC, Siemens and Mitsubishi CNC display units and MDI panels

Coverage

HMI brands we repair

Don't see your brand? Send the part number anyway. Many older and discontinued units can still be repaired or rebuilt.

Allen-Bradley
Siemens
Pro-face
Mitsubishi Electric
Omron
Schneider Electric
FANUC
Red Lion

Questions

HMI Repair FAQ

Can you repair a PanelView Plus?

Yes. We repair Allen-Bradley PanelView Plus 6 and 7, PanelView Component and older PanelView Standard terminals, including touchscreens, displays, backlights and power supplies.

Do you repair Siemens HMIs?

Yes. We repair SIMATIC Comfort, Basic, MP and TP panels and older Siemens operator panels.

Will I lose my HMI program?

Usually not. If the internal memory is intact your application stays on the unit. We still recommend you back it up before shipping.

Is it cheaper to repair or replace an HMI?

Repair usually costs less, and it avoids converting your application to a newer model. If repair isn't economical, we'll tell you and can offer a unit from stock.

What warranty do HMI repairs carry?

A one-year in-service warranty.

HMI & Touchscreen Repair

Get operators back in control

Before you send an HMI

How we repair an HMI

Incoming inspection

Power and boot test

Component repair

Application test

Communication test