Industrial displays get damaged due to long-term operation. To repair HMI, you should know that there are two parts, software and hardware, that’s why the cause of failure can be one of these two parts or both of them. In some cases, it may require specialized and professional repairs due to the type of structure and technology that the displays have. In the following, we explain some of the most common HMI failures.

Some examples of the most common failures of industrial monitors:

In the following, we describe some problems and failures of HMI that require their own specialist

• No image display
• Shutting down the HMI and not turning it on
• Reduce screen brightness
• Gradual turning on and off of the display
• Broken HMI touch screen
• Failure to save settings by HMI
• The problem of not sending commands by HMI
• Failure of the power supply board which causes damage to the main board
• Spontaneous failure of the panel

Some symptoms of HMI failure:

The presence of any of the following symptoms can indicate a HMI failure.

When the brightness of the screen gradually decreases, it is a warning before a complete failure. At this time, you need to repair it immediately before it completely fails.

The appearance of lines on the screen means that the LCD is damaged. Over time, these lines increase, so they should be repaired as soon as possible.

Keys such as login, password related keys are the most used in HMI. When you press a key but that key does not work, it means that the switch must be replaced.

Another sign of a broken HMI is that it does not turn on easily, which means that its internal power supply is damaged.

Some HMI hardware problems:

The screen turns black and the changes are not visible, what is the reason?

When you are working with HMI, but the screen suddenly turns black, it can be a problem with the Screensaver, and if you touch the screen, it turns on. If the screen does not turn on, restart it because it may be due to power fluctuations. But if the problem is still not solved after restarting, it is due to hardware failures.

There are horizontal and vertical lines on the screen, what is the reason?

If these lines are in shadow mode, it can be fixed by adjusting the contrast, but if these lines are clear and bold, you definitely need repairs.

HMI is connected to the power supply but does not turn on, what is the reason?

In the first step, the power supply and the HMI fuse should be checked. If the problem is not one of these two, you should repair it.

Nothing happens when you touch the screen. What is the reason?

• One of the reasons for this problem can be excessive programming commands
• Panel damage
• Damage to the connectors