Thanks to everyone for the help.
My case was a ThinkPad X1 Carbon Gen 7 with motherboard NM-C661. I used an SVOD3 and the pinout from the picture I’m attaching. The reset is not needed when using the pull-down resistor.

In the SVOD software I selected EEPROM, and once the dump was read I changed the data from 0x300–0x34F to FF. After reprogramming, the password issue was solved.

Many thanks again to all, and I hope this can help anyone else who has the same model....