Hello, based on your feedback, the following suggestions are made:
1. Check if there are too many files stored on your controller panel, and format the controller memory.
2. Check whether the file format is supported by the software; you can replace a graphic file to test it.
3. Replace the HMI panel and test to see if there is a similar problem.
4. Replace an HMI connection cable.
5, Download the latest software program, you can log in to my official website to download.
6. If you need to update the controller firmware, you need to provide the existing controller firmware version number and HMI version number.
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Responder