AVM Fritz!Fon C4: White screen / display problems possible solution 

Hi RU-vid,
Here's a clip, which I primarily made for AVM and which presents a small workaround for the white screen problem or artifacts in the display.
Our phone was no longer operable, the screen remained white after a restart. The loosening of one of the top screws on the housing shell has eliminated the problem for my device. Maybe it helps you too. Maybe it is another screw that triggers the problem on your device.
The device has been completely disassembled beforehand and I noticed that it works normally, as long as it was started without housing.
Max