My Gateway DX4200-09 desktop is not waking up after sleep.

Just started happening..when I come back to it, it will not wake up as usual with the mouse. I have to unplug and let it set for a minute. Then will turn on. It has one beep on start-up.
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  1. Best answer
    Check the ram, take them out and clean them and the slots, if they are ok, then the old AM2 Phenom motherboard or the 300w psu, is on its last legs.
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