Computer wont boot

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

Here can can find a solution:
https://social.technet.microsoft.com/Forums/windows/en-US/85ff39fa-2d67-42a9-b4bb-e2037ed425e6/windows-startup-repair-cannont-repair-automatically-badpatch?forum=w7itproperf

won't boot at all?
it's probably the BIOS settings
go to the BIOS settings by pressing F8 or DEL
go to advanced settings
look for "boot device priority" or something like that
set the first priority device as your harddisk
save & exit,restart,happy computing

the "boot device priority" maybe not placed on advanced setting,each BIOS has different interfaces,just look for something like that,it's easy

Computer does not boot upThe problem maybe the RAM, it is faulty or just needsreseating to make proper electrical contact.
Reseat the RAM and then boot up your laptop. If it still does not boot up thenremove the RAM module/s and take them to your friendly computer repair shop andget them to test the RAM for you.

so have to check you battery , if battery don't have problem then check your smps............

Your hard drive needs replacing. You have lost the boot sector on the hard drive.

press F8 before the booting screen appears.there u will find option to start the computer in safe mode

Press the F10 key intially when you start , you will get a short cut option in that you select DVD drive option if select that you can boot your system using your boot cd.

First and foremost, Asus motherboards are garbage, avoid all asus products in the fututre.

You have to set the CD player up as first boot device. If you've done that and it still won't boot from the CD player, the player could have failed or is not connected correctly.

You may have to load software into the bios to start the CD player. Try to find a floppy disk that has CD support files on it. Boot from the floppy to load the CD drivers, and then search the CD for the executable file that you want to run

have you tried re arranging the boot sequence? try arranging this in bios and at the same time, try cleaning your cd drive.

hope this helps