I do not change BIOS very often. Only when I need to change the boot order, depending on what device I have with me to boot from if I need to.
Recently, I needed to do so. On boot, I choose to enter BIOS. Before I can do anything, the computer powers off. Sometimes after a few seconds....sometimes more, but never enough to make a change and save. It has never done this before.
I'm not sure what information is needed. BIOS brand, computer brand...I'll post what you need to know to assist me with this issue.