Expert HMI Repair Services

Every HMI repair at ROC Industrial begins with a thorough visual inspection upon arrival, checking for obvious physical damage to the screen, casing, keypad, or connectors. The unit is then carefully disassembled and meticulously cleaned to remove any dust or contaminants that could interfere with diagnostics or operation.

Our expert technicians utilize specialized diagnostic equipment, including multimeters, oscilloscopes, and signature analyzers, to test all critical components. We pay close attention to common failure points such as the power supply, display backlight and inverter/driver board, touchscreen digitizer and controller, keypad membranes, communication ports, and memory components. We test for correct voltages, signal integrity, and component tolerances.

Once the fault is identified, necessary repairs are performed by our skilled technicians using high-quality replacement parts and professional soldering techniques. We proactively replace components known to be failure-prone for the specific HMI model to enhance long-term reliability.

Following repair, the HMI undergoes rigorous testing. We verify power-up, display clarity, backlight brightness, touchscreen accuracy and calibration, keypad functionality (if applicable), and communication port operation using appropriate test fixtures and software. The unit is operated for an extended period to ensure stability before being final cleaned, reassembled, and prepared for return shipment, backed by our comprehensive warranty.