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Saltgrass
4 Germanium

RE: Dell Inspiron 15 5567 Can't disable Secure Boot to boot from USB drive

In the UEFI section, you should see the USB drive listed is some form.  You might try changing the USB port in case one is disabled during boot.

The Windows Boot Manager is the normal Boot device for a UEFI system.

Do you have another Win 10 system you could check the boot USB drive with?

I have seen screens stay black after the Logo when a video driver did not install completely.  In that case I used the normal keystrokes to get it to reboot, which isn't easy.  An external monitor may help.

If you have diagnostics you can run from the boot you might try that.

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XPS 2720, Inspiron 17 7779, Inspiron 15 7567, XPS 13 9365, Inspiron 1545, TB16 Dock

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