I have a Sun Ultra 24 that will not boot. It says "CPU Fan Error! Please Check CPU Fan!" This issue is a know issue with these systems and I have updated the BIOS as stated in their guide and also reset the CMOS using the jumpers. I am still having this issue and I'm not sure why. I don't know if the disk I have for updating the BIOS is the latest because Oracle doesn't allow me to download anything from their site.