How can HMIs and panel PCs be repaired?
As with IPCs, the cause of the fault is the first thing to consider when repairing or replacing an HMI. In the case of a defective HMI, the cause can be both a defective IPC and a failure of the integrated screens or input devices. In the case of built-in screens, the backlight of the display most frequently fails. The display then remains dark, although it is still functional. But the display itself can also be defective. If the display itself still works but no input is possible, the input function may be defective. In most cases, these faults can be rectified by a repair and it is usually advisable to repair the individual parts. However, in the case of integrated devices, i.e. HMIs with IPCs or panel PCs, the repair options for industrial PCs must also be taken into account. Replacing a Siemens or Beckhoff panel, for example, becomes far more complex because the assembly combines several devices or functions in one component.
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