The BIOS has been updated to the latest 1.15, the CD-ROM drive is set as the first boot device, network boot is disabled, but it still can't boot the system from a bootable CD (there is no problem with the disc or the drive). I even removed the hard drive, and it still couldn't boot from the CD-ROM drive. I just searched and saw some expert mention that it might be a Master/slave problem. I removed the CD-ROM drive, but didn't find any place to set jumpers. What can I do, everyone?

