Computer turns on and turns off a second later. Tags: Prebuilt Computer Keyboards Systems Last response: September 5, 2012 11:40 PM in Systems Share Saintrhys September 5, 2012 5:00:38 PM Hello, I just bought a computer and I set it up, turn it on and it turns off again a second later then will not respond any more after that. I sent it back to the company and they called me saying it was working that it just turned on and off but started up again 3 seconds later. So I receive the computer back and set it up once more to find that it is still doing the same. Am I doing something wrong when I'm setting it up, like having a mouse and keyboard plugged in or is it to do with there not being and OS installed yet. Any help would be amazing. More about : computer turns turns jay2tall September 5, 2012 11:05:50 PM If you bought this off the shelf and wasn't built by you I'd try the below. They may sound silly, but just try them. By the way what brand is it? - Plug it directly into the wall and not through a power stripe. If that doesn't fix it take it to another room that is on a different circuit breaker and try directly in to the wall. - Replace the power cord and try a new one, maybe swap from a monitor or something. I've seen a bad power cable before and I was very frustrated by the time I figured it out. - turn it on without anything plugged into it like monitor, keyboard, mouse, etc. I've seen some really strange things already where a keyboard made a PC reboot. cmichael138 September 5, 2012 11:40:45 PM A computer that is working properly should not turn off and then back on 3 seconds later. If the company told you that, you should take it back for a replacement or repair. Can't find your answer ? Ask ! Publish Related resources Computer turns on, then turns off one second later. Forum My laptop turns on but switches off one second later what do i do? Forum So my computer is really acting bad, after I turn it on it will turn off about 10 seconds later and nothing will be on the scr Forum Everything turns on the then PSU Fans stops running and few seconds later the desktop shuts off Forum Computer turning on, 3 seconds later off? Forum Laptop turns on then shuts off few seconds later. get new laptop?? Forum Laptop turns on then shuts off few seconds later. Forum SolvedComputer turns on for 1 second, then back off. Tried everything. Forum Laptop turns on then shuts off few seconds later. Forum SolvedComputer starts, turns off in a split second Forum Laptop turns on then shuts off few seconds later. get new laptop?? Forum I turn on my pc then 2 seconds later it turns off. Forum SolvedHelp! When i press the power button the computer only starts for a split second then turns off. Forum SolvedComputer turns on for half a second then turns off with new PSU Forum SolvedComputer Turns On For A Split-Second and Then Turns Off Forum SolvedComputer turns on for 1 second and the off. Forum SolvedEverything wired correctly, Computer turns on for a fraction of a second and then shuts off. Forum SolvedComputer turns on for a second and then immediately shuts off Forum Computer Turns Off, then on for a second, then off for a second, and so on. Forum Computer powers on for a split second then turns off Forum More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !