Final answer:
The 'Do Not Connect' donor icon may appear on screens when external devices are not compatible or when required drivers are missing.
Step-by-step explanation:
The screens that display the 'Do Not Connect' donor icon will typically be seen in computer systems where external devices such as printers, scanners, or other peripherals are connected.
For example, when you connect a printer to your computer, the operating system may display a 'Do Not Connect' icon if the printer driver is not installed or incompatible.
Similarly, if you connect a USB device like a flash drive or external hard drive that is not compatible with your computer, you may see the 'Do Not Connect' icon as well.