i just build my computer. when i turn it on it turns off right away. why?

Question

the hard drive, floppy drive, cdrom and dvd burner is out of my old computer and they work ok.

Answer 1

Because you didnt build it right! Its shutting down because something is wrong! Post exact details on what your system does including any beeps you mite hear!

Answer 2

Check the cables from the case to the motherboard. Those cables include four wire speaker cable, hard drive power on.
Reset among others. It is ease to make a mistake in this area.
Verify that one cable is not one pin off.

Computer Help Page

http://www.diskgenius.com/

http://www.pcbeginner.com/tools/pcdoctor.htm

http://www.pcguide.com/byop/index.htm

http://www.ntfs.com/boot-disk.htm

http://www.softpedia.com/get/System/Boot-Manager-Disk/

http://www.freedownloadscenter.com/Best/ntfs-boot-iso.html

http://www.disk-image.net/products.htm

http://www.bootdisk.com/bootdisk.htm

http://www.errornuker.com/info/01.php?hop=product1

http://www.nu2.nu/pebuilder

http://www.majorgeeks.com/downloads2.html

http://www.ntcompatible.com/Acronis_True_Image_9.0_Build_2337_s61449.html

http://www.theosfiles.com/

http://www.data-recovery-reviews.com/windows-startup-disasterrecovery.htm?gclid=CMSl0b7X2YcCFSJxYAodKy6Lpw

http://www.winternals.com/

http://www.pcworld.com/downloads/file/fid,25181-order,1-page,1-c,alldownloads/description.html

http://www.softpedia.com/get/System/Boot-Manager-Disk/Windows-XP-PowerPacker.shtml

http://www.extremetech.com/article2/0,1697,674406,00.asp

http://windows.about.com/od/tipsarchive/l/bltip632.htm
Visit our Helpdesk for PC Bug Doctor
http://www.maximumsoftwaresupport.com
PC Beginner software
http://www.pchell.com/support/limitedconnectivity.shtml
http://www.nu2.nu/pebuilder/
http://www.bootdisk.com/utility.htm
Chapter 1: Purchasing Components
Chapter 2: Component Overview
Chapter 3: Installing the CPU, Heatsink, and RAM On The Mainboard
Chapter 4: Installing The Mainboard In The Case
Chapter 5: Installing Drives
Chapter 6: Connecting Components
Chapter 7: Installing AGP and PCI Cards
Chapter 8: Testing the System and Completing Assembly
Chapter 9: Installing Windows XP
Chapter 10: Configuring Windows XP
Chapter 11: Installing A Dual Boot Operating System (Linux And Windows XP)
Chapter 12: Home Video -- “So, You Want to Be the Next Steven Spielberg?”
Chapter 13: What’s Next?

http://www.hardwareanalysis.com
http://www.majorgeeks.com/download4007.html
http://www.nu2.nu/bootdisk/
http://www.free-pc-checkup.com/
http://www.pctools.com/registry-mechanic/?ref=Googlebspeed
http://pcperformancetools.com/recovermyfiles.htm

BUILD YOU OWN COMPUTER:
www.directron.com
www.newegg.com
www.monarchcomputers.com

Answer 3

Did you put thermal grease on the CPU? Does the CPU have a good fan on it? The most common reason for a computer turning off almost immediately is that it does not have sufficient cooling for the CPU.

Also listen for any beep codes and double-check all your cables.

Answer 4

Make sure that nothing is shorting anywhere cuz that can make it shutoff. I had that problem on the last computer I built. Turns out one of the screws was touching the mobo without a washer.

Also, make sure that the processor is installed correctly

Answer 5

check ide config ide 0 hd with cd/dvd hd master cd/dvd slave ide 1 hd slave cd/dvd slave,check power cables seated correctly

Answer 6

probably built it and havnt installed any driver need more info