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  1. #1
    New Lounger
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    Question Win XP dead after blackout

    My computer had its usual "after blackout hangover." Whenever we lose AC power long enough that I have to shut down my UPS, my computer will not start up normally (absolutly nothing happens when the power button is pressed). This has happened 6 times in recent years, and the consistent cure has been to leave it off with no AC applied overnight. Then , connecting the AC plug and pressing the power button on the tower starts it normally. And it starts normally until the next prolonged loss of AC power. (2003, Dell Dimension XPS, WinXP Pro desktop.)

    What is preventing it from restarting immediately after AC restoration?

  2. #2
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    I reckon your power supply is not happy.
    The power supply controls the power on via the motherboard, either with the power button or wake on LAN/modem. The power supply always provides standby power to the motherboard to allow control and when asked it then provides all the other power to run the ancillaries. When you turn the power off / remove the AC cord the power supply shuts down completely, but it should fire up the standby power as soon as you re-apply power. Leaving it off overnight suggests lingering power in the power supply prevents it working, but this is discharged after several hours.

    cheers, Paul

  3. #3
    Super Moderator CLiNT's Avatar
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    It isn't necessary to leave it off overnight.
    Just disconnect the power plug, drain all capacitors by pressing the power on switch, then wait 5 min.

    As soon as your power goes out and your UPS kicks in, begin the process of saving and closing out all applications, then shut down normally.
    Make certain that when you do get up and running after a sudden power loss that a "check disc" is performed, especially with Windows XP.
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  4. #4
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    I would consider changing the battery, I had weird start up issues on an old machine till I did that.

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