T14 G2 has died after updating to v1.55 UEFI

[ThinkUnplugged]

I have updated to the new UEFI version 1.55 (N34UR22W). The update went as usual.
Upon reboot, I have noted that the laptop is unable to boot into OS, from a "live" USB or in the Lenovo Diagnostics.
Other items from the "App Menu" work fine, including the Setup and ThinkShield Secure Wipe.

I have attempted the following:

• Reset BIOS settings to factory defaults.
• Disable Admin and NVMe passwords.
• Disable Secure Boot.
• Disconnect NVMe drive and remove additional RAM.
• Disable internal battery, then physically disconnect the main and CR2032 batteries and wait several minutes before re-connecting them back.
• Power-on with an external monitor and keyboard connected via HDMI and USB respectively.

I am at loss and would appreciate an advice as the warranty is over.