…This content is for 1-days, 7-days, 30-days, 90-day, 6 months, and 1year members only.Login Join Now Post navigationTHINKPAD E480 EE480 EE580 NM-B421 REV 1.0 WORKING BIOS 16877-1 448.0CJ03.0011 WORKING BIOS