Power saving mode and the keyboards or mouse won't turn on [Solved/Closed]

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 Abel -
I have a dimension E521 and each time I turn it on it says power saving mode and the keyboards or mouse won't turn on I need
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Wednesday October 8, 2008
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June 15, 2019
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Either the power supply has failed or the motherboard has failed. The monitor is in "power save" mode because it's not receiving a video signal. I suggest you have a local PC repair shop diagnose the problem.

Good luck
OK thank you very much man