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T14 G2 has died after updating to v1.55 UEFI

2020 New name Series after T430-T490 / T530-T590
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Joined: Sat Apr 15, 2023 5:44 am

T14 G2 has died after updating to v1.55 UEFI

#1 Post by ThinkUnplugged » Sat Apr 15, 2023 6:08 am

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.

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