Someone has put a Supervisor Password on the CMOS Setup Utility, which prevents you from making changes to CMOS. You decide to erase the password by erasing CMOS.
What steps are necessary to wipe out the current CMOS password? (Select TWO.)
1. High-level format the hard drive.
2. Low-level format the hard drive.
3. Replace the power supply.
4. Flash the BIOS.
5. >>Remove the motherboard battery.
6. Replace the floppy drive.
7. >>Unplug power.
Explanation : With the power disconnected, you can clear the settings held in the CMOS if you remove the motherboard battery and then replace it (preferably with a new one). This temporarily removes voltage to the CMOS chip so that stored settings are erased, and it is reset. Some motherboards have a jumper to clear the CMOS chip, and some CMOS setup programs have a feature called Restore Default Settings.
Do not confuse the ROM that holds the BIOS with the CMOS chip that holds the configuration settings. BIOS is non-volatile, while CMOS is actually volatile RAM that is powered by battery.
Flashing the BIOS refers to upgrading the BIOS to a newer version. You upgrade the BIOS to take advantage of new features or bug fixes, not to wipe the CMOS settings.
Hard drives need to be high-level formatted before they can be used, but CMOS passwords will remain even after the hard drives are reformatted. Hard drives rarely if ever need low-level formatting. You might have to perform a low-level format if you were installing another operating system (for example, UNIX) on the same drive that used different track and sector divisions.
Replacing the power supply or the floppy drive will not delete the CMOS password.
Objective: Personal Computer Components
