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HP 840 G4 boot stuck at "Sure Start" Logo Screen, Cannot enter setup (F10) or Boot Menu (F9)

HP Elitebook 840 G4
Microsoft Windows 10 (64-bit)

I am trying to boot to a USB on an Elitebook 840 G4.  When I press the power button, it almost immediatley freezes at the Logo screen during boot up.  Nothing works Esc,F10,F9, etc. (I begin pressing as soon as I turn it on)  


I then have to unplug everything, remove the back, remove the battery and disconnect the BIOS battery.  I then re-connect the power supply and enter setup (F10).  I have tried resetting BIOS to factory, disabling Secure boot, changing Sure Start to manual. 


After each try I reconnect the System battery, then reinstall the Laptop battery and replace the cover.  I then restart, log onto the laptop ok.  However, when I shut down again I am right back where I started and it freezes at the "HP Protected by HP Sure Start logo."  I have been through the same process about 4 times now.  Any suggestions?

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