I have a Dell Dimension 2400 that I've been upgrading recently.  I want to upgrade the processor to the one that is a Pentium 4 @ 3.06 GHz with 512kb of cache, a 533 MHz FSB and hyperthreading.  I've managed to find it (I looked at some other posts and people were having trouble) and I installed it.  However, it won't work.  I get an orange power light.  The BIOS version is A03.  From the posts I read, this version is supposed to support this processor.  I was wondering if that's a typo, and I need BIOS version A05, or if I need to do something else.  I'd rather not update BIOS, as it requires Floppy Disks, but I will if that's the problem.