Hello. I need to downgrade my Lenovo Thinkpad T400 BIOS to an older version. I have a ".BAK" file created by Winphlash. But when I try to use Winphlash to flash my BIOS I get an error message "-104 BIOS image checksum verification failed". How do I flash my BIOS from a ".BAK" file? Is the file corrupt? If so does anyone know where can I find BIOS version 2.02 (7UET56WW)? Regards Juha
@Asparagus Lover Thank you. I might try this next. But I would like to know why this error occurs. Is there something wrong with the file? I don't want to flash a corrupt file if it makes my laptop unusable