hi guys. My first post here. I got a Topton unit N6005 4x intel 2.5Gbps, B3 stepping. It worked fine but I got the "itch" and wanted to write a BIOS update from CWWK website. Since the info said it's only for V3/V4 I went for the latest bios version here: BIOS下载. Unfortunately, it worked somehow but I lost the video. it boots fine into pfsense but I got no video on console/bios. I prepared an UEFI stick with the previous BIOS but I am working in blind. - Can anyone list the steps/keys to reach the boot selection menu and select the USB UEFI stick? Many thanks!