Computer starts without pressing the power button
What you have described is normal behavior when newer model power supplies are plugged into power or switched on using the switch on the power supply itself. This does not actually turn the computer on, it's more of a self test. It should not damage the computer.
You said you are using a UPS. When you turn it on, it has the same effect as plugging the computer into a power outlet.
In order to prevent this from happening, leave the UPS on. Desktop computers today are meant to be left plugged in.
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Doopy Doo
Updated on September 18, 2022Comments
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Doopy Doo over 1 year
When I open the switch of the power supply, the computer automatically starts up and then in three seconds automatically shuts down.
I have tried shutting down Windows properly, but this unusual behaviour is still there.
The vendor says this is normal! But how can that be?
Whenever I switch on the UPS/power supply the computer starts and shuts down which might some day cause any hardware to go bad!
How do I prevent this?
There is NO power loss.
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Admin about 12 yearsu cant. thats a normal behavior made by wired-logic in the power supply itself. u can buy a used old but a good premium category PS without this feature. e.g. ENERMAX. (i am using a 10years old one right now) u might need some very cheap MOLEX>>SATA adapters for newer HDDs,SSDs. make sure the output power matches the one u r using. if u can find one hiding in a warehouse 8-10years ago unused, buy that. if u r buying a heavily used one take it to an operator and have him replacing old elco capacitors on the PCB. then u can use it for long years and get rid of that feature.
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Doopy Doo about 12 yearsNo there is no power loss. It happens even when the computer is shut down properly.
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Doopy Doo about 12 yearsif you are right, is there a way i can stop this SELF TEST? Its well annoying for a few.
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Sirex about 12 yearsin that case @charlie's answer applies.
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Doopy Doo about 12 yearsokay but i dont want this self test. how to turn it off. and cannot let the computer remain plugged in because of children..
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Doopy Doo about 12 yearscannot let the computer remain plugged in because of children..
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CharlieRB about 12 yearsSorry. If you choose to unplug it, you will have to live with it acting that way. Why does it need to be unplugged because of children? If you are trying to restrict access, there are other options.
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Synetech about 12 years