Computer Hardware
You get a CMOS checksum error during bootup. What is most likely the cause?

hard drive types are incorrectly defined
CMOS battery is nearing end of life
power supply is bad
BIOS needs updating

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Computer Hardware
A brownout is defined as:

complete power out lasting a few minutes
a slightly elevated voltage lasting from seconds to minutes or more
has nothing to do with electricity
a slightly decreased voltage lasting from seconds to minutes or more
alternating power out, power on lasting a few minutes

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