siemens esprimo P720 – does not find show boot devices

is clearly a bios problem.

the ONLY possibility to boot from cd is go into bios (F2/Del straight after power on) and do “restore defaults” “save and exit”… now it still won’t show any boot devices in bios… but atleast it starts windows setup from SATA attached to port1 (second from left) DVD/CD-ROM.

Fix the MBR in Windows 7

start PC hit F8 like crazy… until you can choose to “Computer Repair”.

You need your original Windows 7 installation DVD to boot into System Recovery Options and run Command Prompt.

If you don’t have the Windows 7 installation CD/DVD to run Command Prompt, go to Fix MBR with Easy Recovery Essentials.

The instructions are:

  1. Boot from the Windows 7 installation DVD
    • or: i installed a second harddisk and installed windows 7 on it
    • during boot hit F8 -> “Computer repair options”
  2. At the “Press any key to boot from CD or DVD…”, press any key to boot from the DVD
  3. Select a language
  4. Select a keyboard layout
  5. Click Next
  6. Select the operating system and click Next. The “Use recovery tools that can help fix problems starting Windows” must be checked when you select the operating system.
  7. At the System Recovery Options screen, click on Command Prompt

    Windows 7 System Recovery Options Screen

    Windows 7 System Recovery Options Screen

  8. When Command Prompt successfully loads, type this command: 
    bootrec /rebuildbcd
  9. Press Enter
  10. Type the next command: 
    bootrec /fixmbr
  11. Press Enter
  12. Type the next command: 
    bootrec /fixboot
  13. Press Enter
  14. Remove the installation DVD from the disk tray and restart your computer

this steps alone helped to find the broken-bootloader-windows-installation on the first harddisk and now a boot prompt during boot allows me to choose the first or the second harddisk to boot from 🙂

now the bootloader is on the second harddisk, so i can not boot straight from the first harddisk – which sucks but i am happy i could fix the damn thing in the first place.

FIXED X-D

If bootrec /fixmbr and bootrec /fixboot doesn’t work, try restoring the boot sector code of your Windows 7:

  1. Determine the drive letter of your Windows installation CD/DVD by typing these commands in the Command Prompt: 
    diskpart
select disk 0
list volume
  2. Look for the “CD-ROM” word in a “Type” column. This item is your CD/DVD installation drive letter.
    If the drive letter is D:\, type these commands:

    exit
D:
cd boot
dir

    If the drive letter is different than D:\, replace the second command with the drive letter you have noted from the previous list volume command.

  3. Type this command: 
    bootsect /nt60 SYS /mbr
  4. Press Enter
  5. Remove the CD/DVD from the disk tray
  6. Type exit
  7. Press Enter to restart your computer

credits: https://neosmart.net/wiki/fix-mbr/#Fix_the_MBR_in_Windows_7

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