Power outage (with UPC)

Dell / DIMENSION 4600
January 8, 2009 at 20:38:34
Specs: Vista Ultimate, 3.2GHz/4GB
I have an APC Back-UPS ES 550, and anyways the power went out for about two minutes, and it automaticaly put my computer into hiberation. I than turned the computer back on as soon as the power came back on, and Windows Vista was back on and than boom, the computer just shut off, as if the power went out, even though the power was on.

So my UPS did its job when the power went out, but when the power came back on that is when it shut down, may I add it was not a computer problem, since my monitor also shut down.

I have a theory that a UPS will not work if the battery is below about a 10% charge, and it will just cut out.

I did a chkdsk /R scan on my computer, which took about three hours, to make sure nothing bad happened to my HDD, and it found no errors. I have read forums saying that when the power went out, and the computer did not shut down properly people could not save, or Windows would not start or even it may corrupt important files. Since I did that scan and it found no problems does that mean I am safe, or is something going to happen one day because the computer was not shut off properly?

Thank You,


My Maxed Out Pentium 4!

Dell Dimension 4600
Pentium 4 HT EE @ 3.2GHz
1.0 TB SATA II Drive
Windows Vista Ultimate

Computing.net Member since 2003!

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January 8, 2009 at 21:37:54
An abnormal power down does not automatically cause a problem. It can, but windows is pretty good about the way it handles files, so it's not that common for an abnormal power off to cause a problem.

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January 9, 2009 at 03:28:08
>> I have a theory that a UPS will not work if the battery is below about a 10% charge, and it will just cut out.<<

This is true, the UPS will shut of before the battery is completely drained. However, two minutes should be well within the capabilities of even the cheapest UPS.

I would have the UPS battery checked and see if it is still performing properly. Batteries do wear out.


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