Six Common Faults and Solutions for Industrial Displays

Industrial displays are display devices used in industrial applications. Compared to ordinary monitors, they offer more stable performance and a wider range of adaptability. However, what should you do when screen brightness problems occur? What are some common faults in industrial displays? Let's learn more with the help of Innovationway Intelligent's editor.

I. Screen Distortion and White Screen Faults

Screen distortion or white screen problems are mainly caused by issues with the drive voltage of the industrial panel display. If the display's drive circuit is on the motherboard, then it's likely a motherboard fault. If the industrial display's drive circuit is on the LCD screen itself, then the display needs to be replaced, and the repair risk is high.

II. Color Distortion Faults

Color distortion faults can usually be resolved by adjusting the display in repair mode.

III. Screen Lines

Screen bright lines or dark lines are generally faults of the LCD screen itself. Bright lines are usually caused by problems with the ribbon cable connecting to the LCD screen. Dark lines are usually due to leakage in the screen itself.  Both of these problems basically mean the industrial display is beyond repair, as the cost of replacing the screen is too high.

IV. Display Interference

Other relatively uncommon interference faults: In different operating modes, industrial displays may experience some interference, but most of these are normal phenomena, including some caused by unstable voltage. Due to the special manufacturing process of industrial displays, only problems detected under standard operating conditions can be identified as faults.

V. Display Not Lighting Up

The industrial display lights up briefly and then goes dark, but the power indicator light remains on. This problem is often caused by high-voltage abnormalities, triggering a circuit protection mechanism. In this case, the LCD screen usually still displays an image, which can be seen by "looking at it from an angle." The key to troubleshooting is using a comparative repair method. This is because the high-voltage board of industrial displays generally uses a symmetrical design, and the possibility of both sides failing simultaneously is practically zero. Older machines are prone to problems with the boost transformer and the lamp tubes, while newer machines have relatively more problems with the protection circuit and manufacturing defects.

VI. Industrial Display Completely Without Power

This is actually a very simple fault. Industrial displays generally have two types of power supplies: internal and external, with external power supplies being more common. Regardless of the power supply type, its structure is much simpler than that of a CRT monitor's power supply.  The components that are prone to failure are usually small components such as fuses, input inductors, switching transistors, and Zener diodes. A less common fault is the power supply failing to start due to a problem with the motherboard's CPU.  The principle behind this is also quite simple: the control signal is sent from the keyboard to the CPU, and then the CPU outputs a control signal to drive the power supply and the switching integrated circuit.

In summary, these are the common faults of industrial display screens. For problems related to whether the screen lights up, it's necessary to pinpoint the exact source of the problem before attempting any repairs. Non-professionals should never attempt to disassemble the device themselves to avoid causing further damage.