Title says it.<BR>I installed RH 7.3 on a a Sony laptop.<BR>hard drive, 15 GB 3 partitions:<BR>1-NTFS with windows xp pro.<BR>2-extended FAT32 no OS.<BR>3-ex3 for RH (this parition is not included in ...

It's not a problem with the BIOS, but the CMOS settings that a BIOS update would usually clear. As a result, your hard disk is not properly detected or not detected at all.