Computer Hardware
What beep codes could indicate a system board or power supply failure?

All of these
no beep
steady short beep
one long continuous beep tone
steady long beeps

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Computer Hardware
A brownout is defined as:

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
complete power out lasting a few minutes
a slightly elevated voltage lasting from seconds to minutes or more

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