Lenovo IdeaPad 3 15ADA05 (81W1) — cannot enter BIOS, system always boots in Legacy mode

Hello.

I’m trying to diagnose a Lenovo IdeaPad 3 15ADA05 (Model 81W1).

Hardware

Model: Lenovo IdeaPad 3 15ADA05 (81W1)

BIOS version: E8CN34WW

Internal drive: NVMe SSD (detected normally)

Symptoms

BIOS Setup is almost impossible to enter.

Pressing F2 during power-on usually freezes on the Lenovo logo or is ignored.

The Novo button opens the Novo Menu, but selecting BIOS Setup...

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