Monitors won't turn on

So I work at a college as a computer lab tech. Several of the monitors on our computers have stopped working, they won't turn on, the monitor power button flashes orange/amber and emits a high pitch beeping sound, They are old Dell monitors. They're running windows XP. It just seems to me like the monitor went out but without warning. So any ideas?
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  1. Best answer
    High pitch noise = dead monitor.
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