How can I boot my PC after my GRUB bootloader was corrupted?

GamE February 16, 2013
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I had 3 operating systems installed – Windows 7 , Fedora 13 and Mageia 2 on my Acer Aspire 4253 laptop. I deleted the partition of Mageia and my GRUB got corrupted. I didn’t have an installation DVD of either Windows 7 or Fedora, so i used Super GRUB 2 from a flash drive everytime to boot my laptop.

Today when I was using Windows 7 , my battery was critically low and laptop got hibernated . When I plugged in the power and restarted the ‘Press F2 ,F12 ‘ prompts were missing and flash drive is not getting detected after POST . What can I do now to boot my PC?

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  1. Richard Barton
    February 23, 2013 at 8:24 pm

    Go to this link http://sourceforge.net/p/boot-repair/home/Home/ and download the iso,burn to disc follow instruction/prompts and you'regain acces to your pc.I keep a 1gb usb stick with this utility on just incase and it's come in useful on more than 1 occasion.

    Let me know how you get on.

    Rick

  2. Nevzat Akkaya
    February 19, 2013 at 7:10 pm

    Try SuperGrubDisk, it saved me a couple of times when I had boot problems. It has many options to select boot device, it even automates the process. Worth trying. I wish you luck. http://www.supergrubdisk.org/category/download/supergrub2diskdownload/

  3. ha14
    February 17, 2013 at 11:38 am

    if your Acer has a recovery partition you can go to that screen (It should be Fx (x= 1..8..) key then use it to format the laptop to factory settings.

    you should be able to purchase linux which comes with fedora cd inside, use it to repair/re-install so that to fix grub.
    boot the live CD, mount your USB drive so that grub will see it, then do sudo update-grub2.

    you can try Plop Boot Manager
    http://www.plop.at/en/bootmanager/download.html
    to see if it will help to fix your usb flash drive not detected
    http://makegadgetswork.blogspot.fr/2012/02/how-to-boot-from-usb-when-bios-does-not.html

    Wiki » Installation of Mageia in dual boot with Windows
    https://wiki.mageia.org/en/Installation_of_Mageia_in_dual_boot_with_Windows#You_have_to_fix_the_MBR
    5.1.2.3 You have to fix the MBR, you will need the recovery cd of windows, you can have from another pc uwing windows 7
    http://windows.microsoft.com/en-US/windows7/Create-a-system-repair-disc

  4. Gaurav Joshi
    February 17, 2013 at 4:51 am

    use easy bcd select your linux drive into it

  5. Gaurav Joshi
    February 17, 2013 at 4:46 am

    sudo mount /dev/sda5 /mnt *****Using the linux installation on your hard drive instead of /dev/sda5
    sudo mount --bind /dev /mnt/dev
    sudo mount --bind /proc /mnt/proc
    sudo mount --bind /sys /mnt/sys
    sudo chroot /mnt
    grub-install /dev/sda *****Using your boot device instead of /dev/sda
    CTRL-D
    sudo umount /mnt/dev
    sudo umount /mnt/proc
    sudo umount /mnt/sys
    sudo umount /mnt

    video link :http://youtu.be/8lod8sRb_6I

    or simply use boot repair disk http://sourceforge.net/projects/boot-repair-cd/

    • Shankar C
      February 18, 2013 at 12:53 pm

      booting from cd / dvd drive and flash drive is been disabled by the bios..I could see only the acer logo and nothing else in the bios screen

    • Gaurav Joshi
      February 28, 2013 at 11:57 am

      press f12 or delete when u see acer logo

    • Gaurav Joshi
      February 28, 2013 at 11:58 am

      change boot order in bios

  6. Bruce Epper
    February 17, 2013 at 1:01 am

    Use a friend's system or something to get a Fedora installation ISO and burn it to disk. Boot your system with your installation disk and at the installation boot prompt type 'linux rescue' to enter rescue mode. Type 'chroot /mnt/sysimage' to mount the root partition. Now, type '/sbin/grun-install bootpart' where bootpart is your boot partition (normally it will be /dev/sda). This reinstalls the GRUB bootloader. You should also manually review the /etc/grub.d/10_linux file and /etc/grub.d/40_custom to see what (if any) additional entries are needed to get your entries back for Windows.

    At a minimum, this should get Fedora working for you again and from there you should be able to suss out what needs to be done to get your Win7 stuff back again.

  7. Jim Chambers
    February 17, 2013 at 12:38 am

    For some reason your Bios has been reset to the Default Settings. Enter Bios Setup with F2 on bootup and reset to your previous settings. Use Super Grub to repair Grub on your HDD as shown here http://ubuntuforums.org/showthread.php?t=690912

    • Shankar C
      February 18, 2013 at 12:50 pm

      hey...my bios does not show any options for booting into flash drive or cd/dvd drive since press f2 and f12 options disappeares after windows got hibernated

    • ha14
      February 20, 2013 at 8:55 pm

      remove AC cord then remove the CMOS battery from the motherboard for about 15 minutes. Then insert the CMOS battery and plug AC power cord. Boot to Bios and see if options are there.

    • Shankar GamE
      February 22, 2013 at 2:55 pm

      thanks a lot ha14 your idea worked ....

    • ha14
      February 24, 2013 at 3:43 pm

      glad that your problem was fixed, thanks for your feedback:)

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