One of two things usually.
Start by unplugging the computer for about 15 seconds then plug it in and try to power up. If that doesn't work...
Purchase a new power supply, I'd recommend newegg.com, they are pretty cheap $15+. Search YouTube on how to replace, it's a fairly simple process.
If it still doesn't power up then you will need to replace the motherboard. There are videos for this on YouTube as well.
The most common reason a computer won't start can be a piece of hardware has failed or is causing a problem but that hardware isn't usually a hard drive, the part of your computer that stores all of your files. To fix such kinds of issue, you can take the following steps.1.create a bootable usb or cd ,there are kinds of software for you to complete this step, you can choose Fix Boot,EasyBootDisk or Windows Boot Genius. I suggest you to use Windows Boot Genius, it is easier and more effective.2.boot your computer from the created disk3.fix the issue after run the softwareBy the way, before any further steps you should make sure the power supply is good. Any hardware issues such as pc power and cable,motherboard corrupted should be troubleshooted.I don't suggest you to try the solution above until you are sure there is nothing to do with the hardware.
source:http://windows-8-password-recovery.com/computer-wont-boot.html
Computer is booting from a non-bootable source
Many times this error is caused when the computer is attempting to boot from a non-bootable floppy disk or CD-ROM. First verify that no floppy diskette
or CD is in the computer, unless you are attempting to boot from a diskette.
Note: This error has also been known to occur when a
memory stick is in a card reader and the computer is attempting to boot from it.
If you have any card reader or flash reader make sure that no memory
stick is inside the computer. Additionally disconnect all USB drives, cameras,
ipods, iphones, etc. from the computer.
If you are attempting to boot
from a floppy diskette and are receiving this error message it is
likely that the diskette does not have all the necessary files
or is corrupt.
If you are attempting to install
Windows XP or Windows 2000 and are receiving this error message as the
computer is booting verify that your computer BIOS
has the proper boot settings. For example, if you are attempting to run
the install from the CD-ROM make sure the CD-ROM is the first boot
device, and not the hard disk drive.
Second, when the computer is booting you should receive the below prompt.
Press any key to boot from the CD
Important: When you see this message press any key such as the Enter key immediately, otherwise it will try booting from the hard drive and likely get the NTLDR error again.
Note:
If you are not receiving the above message and your BIOS boot options
are set properly it's also possible that your CD-ROM drive may not be
booting from the CD-ROM properly. Verify the jumpers are set properly on
the CD-ROM drive.
Computer hard disk drive is not properly setup in BIOS
Verify that your computer hard disk drive is properly setup in the
CMOS setup. Improper settings can cause this
error.
Corrupt NTLDR
or NTDETECT.COM file
Below are the full error messages that may be seen when the computer is booting.
NTLDR is Missing
Press any key to restart
Boot: Couldn't find NTLDR
Please insert another disk
NTLDR is missing
Press Ctrl Alt Del to Restart
Causes
Computer is booting from a non-bootable source
Many times this error is caused when the computer is attempting to boot from a non-bootable floppy disk or CD-ROM. First verify that no floppy diskette or CD is in the computer, unless you are attempting to boot from a diskette.
Note: This error has also been known to occur when a memory stick is in a card reader and the computer is attempting to boot from it. If you have any card reader or flash reader make sure that no memory stick is inside the computer. Additionally disconnect all USB drives, cameras, ipods, iphones, etc. from the computer.
If you are attempting to boot from a floppy diskette and are receiving this error message it is likely that the diskette does not have all the necessary files or is corrupt.
If you are attempting to install Windows XP or Windows 2000 and are receiving this error message as the computer is booting verify that your computer BIOS has the proper boot settings. For example, if you are attempting to run the install from the CD-ROM make sure the CD-ROM is the first boot device, and not the hard disk drive.
Second, when the computer is booting you should receive the below prompt.
Press any key to boot from the CD
Important: When you see this message press any key such as the Enter key immediately, otherwise it will try booting from the hard drive and likely get the NTLDR error again.
Note: If you are not receiving the above message and your BIOS boot options are set properly it's also possible that your CD-ROM drive may not be booting from the CD-ROM properly. Verify the jumpers are set properly on the CD-ROM drive.
45 views
Usually answered in minutes!
×