Forum Discussion
Surface UEFI icons top right
First Icon: This usually appears when you tell your system to restart into the UEFI (From Setting - System - Recovery - Advanced Startup - UEFI Firmware settings). After restarting and getting into the UEFI, this icon will appear.
Second Icon: It shows some issues with your Hard disk. After wiping the device with the Microsoft surface data eraser tool, I have seen this icon. Please visit this post for more information about how to solve it: https://answers.microsoft.com/en-us/surface/forum/all/microsoft-surface-recovery-image-failed/c5944881-ce38-4cbb-af78-24980fd642ed
Third Icon: It is the default UEFI icon if you enter it with a key combination (For Surface Pro 8, for example, it is volume up during a restart)
I hope this help.
Have a great day!