not sure if this works for this model but lenovo is usually vulnerable to glitch attacks, if there is a TPM chip on the board.
if you short the CLK and SDA pins togeather before entering the bios, and releasing it at the right time, you can bypass security check, but allow some other data that is needed to pass so the bios shows up then you can just disable password protection and reset bios to defaults.. to get full control back.. it usually takes a few tries
cheers!
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