Montek displays are engineered for long-term industrial reliability — but when issues arise, our goal is to help you identify and resolve them as quickly as possible, minimizing disruption to your operations. This page covers the most common display issues, their likely causes, and the recommended resolution steps. If you’ve worked through these guidelines and still need assistance, our technical support team is ready to help directly.
Before You Contact Support: Have This Information Ready
Having the following details available will allow our support team to assist you significantly faster and reduce the number of back-and-forth exchanges needed to resolve your issue:
Our team will first attempt to resolve your issue remotely via phone or email troubleshooting. If the issue cannot be resolved remotely and physical return is required, we will issue a Return Merchandise Authorization (RMA) number. Products must be returned in original packaging. Please note that customers are responsible for return shipping costs, and if no defect is identified during warranty evaluation, additional assessment charges may apply.
Likely cause: Faulty LED driver board.
Solution: If the backlight system is receiving power but the screen remains dark, the LED driver board is the most common culprit. Replacing the driver board typically resolves this issue. Contact Montek support if you need guidance on driver board replacement or sourcing.
Likely cause: Sharpness setting too high.
Solution: Access the OSD (on-screen display) menu and reduce the sharpness setting gradually until the shadow effect disappears. If shadows persist after adjusting sharpness to minimum, perform a factory reset through the OSD. If the issue continues after a factory reset, contact support.
Likely cause: LED light bar failure or individual LED diode failure.
Solution: Use a current meter to test the backlight circuit. If no current is detected, the light bar likely requires replacement. Contact Montek support for guidance on light bar sourcing and replacement.
Likely cause: Incorrect refresh rate setting.
Solution: If the display is connected in analog mode, try reducing the refresh rate from 75Hz to 60Hz. Refer to your specific model’s user manual for the optimal refresh rate setting for your configuration.
Likely cause: Faulty power outlet or power supply.
Solution: Disconnect the display from its current power source and connect to a verified alternative power outlet or power supply. If the issue resolves, the original power source was the cause. If the issue persists on a verified alternative power source, contact support.
Possible causes: KVM switch or signal extension cable degrading the video signal; incorrect brightness, contrast, or sharpness settings; clock or phase mismatch in analog mode.
Solution: Start by connecting the display directly to the source using a standard cable, bypassing any KVM, extension, or signal distribution equipment. Adjust brightness, contrast, and sharpness through the OSD. Reboot the connected system to reset signal handshaking. If quality improves with direct connection, the signal distribution equipment is the likely cause.
Likely cause: Temporary signal or power initialization issue.
Solution: Disconnect the connected computer or signal source from power, wait 1 to 2 minutes, then reconnect and power on. This clears the signal handshaking state and typically resolves transient “Out of Range” errors.
Likely cause: Display is not set to its native resolution.
Solution: Set the connected system’s display resolution to the LCD’s native resolution. Operating an LCD at non-native resolutions causes text rendering artifacts, edge distortion, and reduced sharpness. The native resolution for your specific model is listed in the product documentation.
Cause: Panel manufacturing tolerance.
Solution: Individual dead or stuck pixels are a characteristic of LCD panel manufacturing and cannot be repaired in the field. Warranty replacement eligibility typically requires a minimum of 5 to 10 defective pixels, depending on the panel specification and warranty terms. Contact support to evaluate your specific situation.
Cause: Static image displayed for an extended period.
Solution: Screen burn-in cannot be repaired. The retained image may diminish over time when varied content is displayed. To prevent recurrence, avoid displaying static content for extended periods, and use screen savers or content rotation for fixed-installation displays.
Cause: Pixel response time limitation, more common in older panel generations.
Solution: If motion blur significantly impacts usability and persists across different content types and frame rates, upgrading to a newer panel with faster pixel response time is the recommended solution. Contact Montek to discuss panel upgrade options.
Likely cause: Brightness setting too low, or partial LED backlight failure.
Solution: First, increase brightness to maximum using the OSD brightness control. If the screen remains dim or only partially illuminated at maximum brightness, one or more LED segments in the backlight may have failed. Contact Montek support for evaluation and repair options.
Possible causes: Loose or damaged video cable; bent or damaged connector pins; panel driver IC failure.
Solution: Resolution steps: Power cycle both the display and the connected source. Run the display’s auto-setup function. Inspect all cable connections and connector pins for damage or poor seating. Swap the video cable with a known-good alternative to rule out cable failure. If lines persist after all of the above, contact Montek for professional service evaluation.
If you’ve worked through the relevant troubleshooting steps above and your issue remains unresolved, our technical support team is ready to assist. Contact Montek Support with your model number, serial number, issue description, and the troubleshooting steps you’ve already taken. We’ll work with you to diagnose the problem and get your display back to full operation as quickly as possible.
