There's 2 ways to reset CMOS/BIOS/NVRAM.  Remove the 2-pin CMOS jumper is what I think you're referring to.  However, we don't need to worry about that because the other way to do it is remove the battery for 10 min.  Replace with a new one (size 2032).  Plug PC back in, power on, and see what it does. Remember, make sure PC is powered off AND unplugged anytime working on the inside of it.
Ok hello thank you for reading this I have an Optiplex 780 sff it a good computer used once refurbished I bought it worked but h=the next it stoped the amber light all the parts were tested but not the board I hear a click on the PSU but it's not the PSU because unplug the 4 pins and boom green light I believe its the board removed everything reseated ram nothing I don't know a new computer will not do this and a motherboard failure this silly I looked carefully beep codes, beep beep that's what I hear I noticed that place were the CPU the left side it looks like rust not left outside I will replace the board but can I jump start it and never shut it down like cut the green wire the PSU works but I can jumpstart it like one said it was the motherboard and instead he replaced the PSU and it worked for seven days until he shut it down I will replace the board can I cut. the green wire to get it going for some time I need it because I have a MacBook Pro 2020 m1 but I like desktops for other things I don't want to mess up my mac that's the way and it was sitting in a box for a year not touched but can you tell if can the green wire I know its the motherboard it will rin sometime and the board costs 30$ can I have that but maybe I just won't shut it down then anything I can do instead of replacing the board
Optiplex 780 amber light blinking 1 and 3 amber power light