Which ports are you trying to use? front or rear? I have seen some have issues with the front… YMMV
I guess the point is, try a different port (i.e. different USB bus)
Has the BIOS been updated?
Also, just to be sure (from the KB):
Set the proper Boot Settings (you may need to click “Advanced” first):
- Disable Secure Boot
- Make sure UEFI is enabled on the Boot Priority screen
- Set the boot order to boot from your SSD first (you can drag the drives into the proper order if you’re using a mouse. Otherwise you can use the
+
and-
keys) - Disable Network Boot
- Enable USB Boot but make sure the SSD has boot priority
- You may need to enable the M.2 slot, depending on the BIOS version
- Save your BIOS changes