Computer Hardware
What would you ask to determine if the display is working?

All of the listed here
Is there high voltage static on the screen
Is there a video cursor or action on the screen?
Did the computer beep or chime?

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Computer Hardware
A brownout is defined as:

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

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