HP EliteBook 650 G9, gets to the HP logo then restarts

[Keithhowdle]

HP EliteBook 650 G9, gets to the HP logo then restarts, while testing Smart Deploy  Cloud image deployment the deployment failed (resolved these issues) on exiting the smart deploy and restarting the laptop, it gets to the HP "Protected by Wolf Security" logo and restarts.  I can press esc, F2, F9, F10, F11, F12 and get the appropriate message in the bottom left corner but the system then reboots in a continuous loop so I cannot get into diagnostics, BIOS, boot menu, PXE boot or factory reset. I have drained and disconnected the battery, disconnected the CMOS battery, on boot I get the POST Error date/time error as expected.  I have removed the NVME drive no errors, beeping or any difference to the boot sequence, to check system faults I removed the ram and got the system beep.  I replaced the nvme drive with a known working one from my Omen, still no boot.  For testing of the nvme drive I USB booted my Omen from the Elitebook drive successfully, proving the drive is working and bootable.   Have tried the win+B power button combos, holding power down for 15 seconds, etc, removing battery and just running from adaptor, I then connected battery, charged it and just run with no mains power I just cannot get past the HP logo or into any diagnostics, BIOS or boot menu to alter the boot sequence.  This laptop is brand new with just the OOBE completed for image deployment testing, I assumed the failed deployment had already wiped the drive but successfully booting from it prove that wrong, indicating a possible issue with the BIOS boot sequence which I cant get into to change.  I am hoping I have missed some something simple.

[_Burak]

I have exactly the same issue with a brand new HP EliteBook 840 G9.

@Keithhowdle: Have you found a solution?