Hi, I have an Audi Q7 (2021) and for the past week, my Instrument Cluster (where the speedometer is located) goes entirely black when I start the car and also shows vertical red streaks. It stays black for a couple minutes and then eventually comes back on. This has happened 3 times this week. I took it in to the dealership, but since it didn't happen there and they can't accurately diagnose it, they say they can't fix it under warranty until they know for sure what it is. Has this happened to anyone, and if so, do you know what the problem is? Thank you.