$100–150. Cost of doing it yourself: $15 (CH341A + clip).
While holding the short, press the power button to turn on the machine. lenovo t470 bios password reset verified
Use the programmer to "dump" (copy) the current BIOS firmware to a file. $100–150
Some technicians locate the physical EEPROM chip on the T470 motherboard and short the SDA and SCL pins at a precise millisecond during the boot cycle to bypass the password check. lenovo t470 bios password reset verified