You all are forgetting one minor possibility.
Disconnect the power button from the motherbaord and attempt to start the computer by briefly touch a small metal object(tweezers) across the two contacts. If the computer starts, the power button is bad.
One of the machines at work had almost the exact same behavior when a power button went bad.
Disconnect the power button from the motherbaord and attempt to start the computer by briefly touch a small metal object(tweezers) across the two contacts. If the computer starts, the power button is bad.
One of the machines at work had almost the exact same behavior when a power button went bad.
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