How do I troubleshoot the MMI display issue in my Audi A5?

I recently noticed that the MMI display in my Audi A5 is not working properly. It has become dim and some parts of the screen are not visible. How can I fix this issue?

First, try resetting the MMI system by pressing the function and control knob buttons together for 10 seconds. If that doesn't work, check the fuses and wiring for any damage. If everything seems fine, it may be a faulty display unit that needs to be replaced by a certified technician.