hi there, ok... I turn my computer on and it starts to boot up then all of a sudden it turns itself off. I push the power button on again and it doesn't come on at all.Then I unplug the power cord from the back then plug it back in and push power button again thn my computer comes on and does the sam and shuts down.And yes the fans are coming on.
thank you
debbie
-   I placed a new 3.2.g processor and I experienced this problem of shuting off . I went back and replaced the processor with a 2.8 and now is working fine -   Guest
Feb 15, 2009
-   I have the same problem. The problem just kept getting worse and now the Computer turns itself off before starting up properly. If I disconnect the hard drive the computer starts up fine and stays on - monitor works OK, drives work OK too. As soon as I reconnect the hard drive the computer shuts down again.
Moni-   moni_i
Feb 08, 2009
-   when booting the system I get three short beeps ? Anyone
-   Guest
Dec 26, 2008
-   Mine is an HP Pavilion. Does the same thing, runs for 5 seconds, turns itself off. After many attempts (maybe 20), it will finally stay on. Replaced power supply - no help.
Only solution so far is, don't turn it off.
-   CharlesMinus
Sounds like a hardware failure. Possilbly the motherboard, more than likely, the power supply.
But then - maybe neither.
Shut it off completely, once you restart, start hitting the F8 key ( once a second ) until you see the " Safe Mode" choices screen. Drop down and select the " Last known Good Configuration" option and hit enter.
If this doesnt work, try the same proceedures ( restart - F8 ) but this time select safe mode - at the top of the list.
If you sucessfully boot in safe mode, you have a system file problem that could be virus related, file table corruptions or registry problems or all combined.
Hey! i had the same problem after i took the computer apart for a clean!!! What happened is that when i took the heatsink off the cpu, the thermal paste had fallen apart a little and i put it back on.... to find computer booting up for about 3 seconds then turning off. i think that when you fire the comp up it turns on the cpu causing it to overheat and shut itself off, just cleaned off old paste and put on some new paste and it fired up! hope this helps you! sorry bout the slight delay!
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