Product Description
Is your Siemens SIMATIC HMI showing a black screen or no display at all? A black screen on your SIMATIC Basic, Comfort, or other panel can halt your operations. ROC Industrial offers expert repair services for Siemens SIMATIC HMIs experiencing black screen issues. We diagnose and fix the underlying problem, often related to backlight or power supply failure, to quickly restore your display.
Is Your Device Showing These Signs?
The SIMATIC HMI black screen issue commonly stems from a corrupted operating system, a faulty backlight inverter, or a damaged LCD panel. Firmware corruption during updates or power failures necessitates a re-flash using the ProSave tool. Hardware failures such as a defective power supply unit or a blown fuse on the HMI board prevent proper operation. Communication errors with the PLC, often due to incorrect Profinet or Profibus configuration, cause display issues. Resolving these problems involves troubleshooting the hardware components, verifying the software integrity, and ensuring proper network settings for seamless HMI-PLC interaction.
Technical specifications
A "black screen" or "no display" fault on a Siemens SIMATIC HMI (e.g., TP series, KTP series, MP series) typically points to a failure in the backlight system (CCFL or LED), the inverter/driver board supplying power to the backlight, a malfunction in the HMI's internal power supply unit, or, less commonly, a critical failure of the LCD panel itself or the main logic board's video output. Our diagnostic process involves testing these specific circuits and components to identify and replace the faulty part, ensuring the SIMATIC HMI's display is fully restored.
Our Repair Process for the
Repair Service
Our repair process begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the black screen issue, whether it originates from a corrupted operating system, a faulty backlight inverter, a damaged LCD panel, firmware corruption, a defective power supply unit, a blown fuse, or communication errors. We address firmware corruption by re-flashing the HMI using the ProSave tool. Hardware failures are rectified through component-level repairs or replacements, ensuring the power supply unit and fuses are fully operational. Communication errors are resolved by meticulously verifying and correcting Profinet or Profibus configurations, guaranteeing seamless HMI-PLC interaction.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY