Hello,

I have a P73, and it was working fine with Ubuntu Linux (no Windows installed). But since I tried to change the PK/KEK/DB keys to my own, the notebook refuses to boot from any source, execute any of the builtin tools and even enter the Bios setup. Instead, after POST it prints "Configuration changed - Restart the system" for a split second, then resets and starts POST again. I do not think I have locked myself out because of the installed certificates, because 1. secure boot still ought to be disabled, 2. there should be a different error message, and 3. the bootloader is signed with the correct keys.

Bios settings that I made before changing the certificates (and which worked OK): Secure boot disabled, No supervisor password, No user boot password, Quick boot disabled, Boot logo disabled, Compatibility (legacy) mode disabled. Bios version is N2NUL07W (1.17).

What happens when I power on the notebook:

BIOS POST shows up OK, message "Press <F1> to BIOS seup" appears.

- If I do not press any key, with Linux boot SSD installed, it prints "Configuration changed - Restart the system" and restarts.

- If I do not press any key, without any bootable storage device, "Configuration changed - Restart the system" and restart.

- If I press F1 for setup, "Configuration changed - Restart the system" and restart.

- if I press F12, the boot device selection appears:

  - if I select any of the bootable options (stored in BootOrder variable or bootable media) the screen flickers shortly and boot device selection reappears

  - if I press TAB and select any of the Tools in App Menu (Setup, Diagnostics, Secure wipe), "Configuration changed - Restart the system" and restart.

When googling for the error message, I found some old posts dating back to 2011, but it seems these systems did boot after restarting 1 or 2 times. I also created a service request #409N63T, but I hope there is a solution that does not require to send the notebook back for service (and there is no service location listed for either Czechia or Austria).

Any tips on what I could try next?

Finally after 2 full months, the situation is resolved: I "solved" it by ordering a HP zBook 17 G6 to substitute the P73. Still waiting on the reimbursement from the Lenovo dealer though.

Originally, I did not try to fix the problem myself because I did not want to void the warranty. At that time I did not know that warranty is useless anyway because Lenovo is incapable to provide replacement parts.

Farewell Lenovo.