A5 Multimedia screen

Hi,

I got in my car last night and noticed my main center screen in my 2012 tdi was barley readable and was so dull it was almost useless. It had been in an airport car park so I checked the brightness knob on the right of steering wheel in case they had adjusted it, it was on maximum, then I checked the screen menu itself and that was on maximum. I restarted the car and nothing. After 30 min of driving, it came back itself, then went again a few min later into this dark, dull, dormant mode where its do dark, you cant see it a night while driving.

Any thoughts or any experiences guys? I have an extended named component warranty with Audi but I am sure this won't be covered!

Thank you in advance