HP 15-p251nt bios DAY21AMB6D0_REV-E bios DAY21AMB6Do_REV-E bios Main 8 MB bios EC 4 MB bios
HP 15-p215ln bios DAY21AMB6D0 Rev: D bios DAY21AMB6Do Rev: D bios ec: KB9028Q - C 4 MB bios