After software update of the DE10-NANO-sd-card the HDMI-port seems to be damaged. Is that possible or there other options to reset that?

Thanks. If from Intel PSG stand point. Usually we will ask user to narrow the issue by using the example design as below: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug-hdmi-de.pdf However, this is Terasic board, I doubt that Terasic does not use the full solution from us. So, it is better to consult them directly as we can see this is board level issue instead of the FPGA.