I have a 2020 Hyundai venue Denim and sometimes when I go to start my car the screen won’t turn on but I can still connect to Bluetooth. Also when I put my phone charger in the USB Port to connect with apple carplay, it will also cut off even if it is still plugged in. Is this happening to anyone else. The dealership said they can’t fix it unless it happens to them when my car is getting serviced.
I would recommend visiting your dealership as a walk-in (without turning off car when you arrive) to show the issue when it next occurs (the best method for this issue) or try taking a video the next time and show it to your service advisor/manager at your dealership. Make sure to include in the video a view of the dash showing the vehicle in key on/engine on condition (sometimes this can help get the ball rolling but is less likely to result in any process for repair.)
Unfortunately this issue is difficult to replicate for the dealers and requires visual verification by the technicians to determine source of failure through inspection/techline assist or to qualify for head unit replacement under warranty. Depending on the circumstances surrounding your specific vehicles findings by the dealership and the extent the personnel will go to assist you, it may take a couple tries until any repairs are performed.
Resetting the head unit (through the tiny pin hole factory reset button) tends to remedy this issue for a short period of time if you find yourself annoyed on a morning drive but will ultimately return on later start ups. Some dealers may use this as a documented "first step"-like repair before any tangible repairs are made.