Apple recently switched from the default for most apps being provided with a white background, to allowing the user to select a 'Light' theme or a 'Dark' theme. You can change this by going to Settings -> Display & Brightness -> Appearance - Options for Light and Dark. If you are in Dark mode you will see only a black screen on start up.
If you have a Gen 2 motor with a Blue Control Panel please use the Gen2 instructions. if you have an older motor that has a key you will need to remove the 4 screws on the front cover of the box where you insert the key. Be careful not to drop the screws in the water as they do come out of the box. Use the instructions below labeled IOS or Android Instruction Guide.
GEN 2 IOS - APPLE CONTROL PANEL INSTRUCTION GUIDE