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many boards are shipped with only two pins. Generally the process is to short those two pins out using a jumper while the power is disconnected.
If you are sure those two pins are for clearing the CMOS that is probably how it works. As was already suggested, consult your manual.

For whatever reason, the link I posted in your other thread no longer works. I did a quick search on the forums & found the following:

Why do you want to reset the BIOS?
What problem(s) were you having before?What happened to my quote

i deleted hardisk from boot order i performed the alt e f b steps but it sticks in the bios i need to restore bios i have a dell 2400

"i performed the alt e f b steps"
Where does it say to do that? Follow the instructions exactly:
1. Restart the computer & press F2 to get into the BIOS.
2. Press the Caps Lock, Num Lock & Scroll Lock keys so they're all lit up on the keyboard.
3. Press the Alt & E keys at the SAME TIME. The system will beep once to let you know that the NVRAM has been cleared.
4. Press the Esc key and then the Enter key to save the changes. Reboot.
I'm adding the following:
5. after the reboot, press F2 to access the BIOS again. Run thru ALL the settings & reconfigure them as necessary, save & exit.

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